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Birch, Beech, Walnut request honored if available. Great slide at a good price!! Can a M1 Carbine be converted to a m2? The cam cut was slightly changed with the net result of all changes adding .080" for the slide to travel By May 1941, Williams had shaved the M2 rifle prototype from about 9.5 lb (4. . We have recently added some M1 Carbine stocks to our stock section. Accessories Handguards Magazines Parts List Schematic Like many before me I've found the curved 30-round mags to be less reliable than the straight 15-round types. Price: $4.95. During the month of November 1943 (when these particular bolt changes were standardized) M1 Carbine production peaked with 528,765 M1 Carbines manufactured by nine prime contractors at ten separate facilities. The M2 Carbine was a development of the highly successful US M1 Carbine (see FIR 6011). Modification or replacement of the type 1 firing pin was mandatory during Ordnance rebuild operations post WWII. This modification was not implemented as a standard The frame also contains a button-release folding mechanism at the front, and a buffer tube at the rear. On 18 Nov 1943, Ordnance adopted several changes to the type V slide to increase the distance the Note the orientation of the type II plunger to facilitate proper engagement of the lip inside the extractor. M2 Carbine Potbelly Stock Walnut used G.I. You are bidding on ONE M1 Carbine operating slide spring. . February 28, 2023 By Smith & Wesson. 10+1. As a result, Williams redesigned the M2 to incorporate a Garand-style rotating bolt and operating slide, retaining the short-stroke piston. Flat face with a 45 degree bevel cut around the edge of the face. using a standard form (data sheet) since 1978. Posted by Michael L Bonomo on Aug 13th 2020 . Used condition. Identification of the type II versus type III extractors usually requires disassembly of the bolt and removal of the extractor. This is HSA or High Standard Arms manufacture from the early to mid 1950's. These were produced to use as replacement /overhaul slides for the rifles retuning from the Korean War. incorporate the lip and notch design similar to the type III extractors. Barrel Band, Type 2, without Bayonet Lug, M1 Carbine Part #: FA-C-005 Price: $19.95 Quantity: Barrel Band, Type 3, with Bayonet Lug , USGI New, M1 Carbine Part #: FA-C-006 Price: $39.95 Quantity: Barrel Band Retaining Spring, M1 Carbine Part #: FA-C-007 Price: Quantity: Butt Plate, FA, M1 Carbine FA-C-013 Price: Quantity: The military issued soldiers field conversion kits (T17 and T18) to easily convert M1s into serviceable M2s. M2's Disconnector Lever. I've really enjoyed my M1 carbine since I bought it 2 years ago but I sometimes think what it would be like to shoot the Select Fire M2 carbine. Dummy and Inert Grenades, Mortars & Rockets, Buttplates, Grips, Stocks, Forends & Handguards, Rocket Launcher, Bazooka, Cannon and Mortar Parts, Women's Tactical Gear, Accessories & Gifts, Flags, Stamps, Decals, Posters & Wallcharts, Everyday Carry Knives, Tools & Accessories. Name Email Required. GI specifications. The large amount of data submitted over the years has been the primary source used by M2 Carbine Operation - YouTube 0:00 / 9:26 M2 Carbine Operation adcosteve 5.25K subscribers Subscribe 4.1K Share 494K views 13 years ago How an M2 Carbine works. The result was less flash at the breech near the shooter's face. There are several theories as to how this happened but they are only theories. The registered serialized part is trip lever so you can blast and build another new gun forever. Chambered in 9mm, the optics-ready FPC has a length of 30 inches and a compact folded length of 16 inches. Improper headspace and/or "hot" reloads can be another reason for these cracks/breaks. M1 Carbine Sear, Choice of Manufacturer . drawing/part number 7160091 (sometimes D7160091) was added to the bottom of the slide. Tracer1951 Rating - 100% 1 0 0 Joined Nov 24, 2012 Walnut M2 and Service or Collector stocks available with special markings at additional cost. Show more Show more M1/M2 Carbine 15rd Mag Springs (3 pack), New G.I. The three parts that are exclusive to selective fire and have no place in a semi-auto are the disconnector, disconnector lever, and selector. than that of the type II, however, short shank type I and long shank type II plungers are occasionally $75.00. I was a Marine Cpl. The changes implemented Once the screw is backed out the plunger and it's spring Numrich Gun Parts has been providing parts like these M2 Carbine parts since 1950 and has the experience and selection that you'd expect from the leading source of current and obsolete gun parts. behind the lugs indicates the bolt does not include all of the design changes that accompanied the Commercially Manufactured M1 Carbine Replacement Parts What You Need to Know About Parts There is only one standard for the dimensions, machining, quality, and life span of every part on an M1 Carbine. observed. While our method Changes in parts designs were made to cut production costs and time, improve reliability and/or function, The fire prototypes of the M1 Carbine had actually been selective-fire guns, but that requirement had been dropped by the time the Winchester design was officially adopted as the M1. Website by Hudson. This can also occur with anything that impedes the movement of the right bolt lug. The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. Joris Nieuwint is a battlefield guide for the Operation Market Garden area. It will be used during reassembly. The King Arms M2 series gas airsoft guns are constructed from real wood and feature realistic operations Bolt lugs with the pointed tip have a width approximately .05" less than those with the curved/flat tip. The M2 carbine has endured throughout the decades to grow into one of the most desirable Civilian NFA pieces for exactly the same reasons it won over thousands of GI s during its military service: it is a light, handy, well engineered weapon with a natural feel to it that is easy to master and enjoy the sport of Full?automatic shooting. ), Firing Pin, Used Factory Original (National Postal Meter - Marked N-N), Extractor Spring, New (May Show Storage Wear), Extractor Spring Plunger, New Reproduction, Ejector & Spring Assembly, New Factory Original, Rear Sight, First Issue, New Reproduction ("L" Type), Rear Sight, Middle Issue, Milled (Kensight), Rear Sight, Type II, Milled, Used Reproduction (without Aperture), Handguard, Walnut, Used Military Surplus (Good Condition; Sold As Is), Handguard, Metal, Solid - Not Vented, Blued, Used Good To Very Good Condition, Stock, M2, Pot Belly, Hardwood, Used (w/ Metal Hardware), Barrel Band, Blued, New Reproduction (w/ Swivel & Screw), Barrel Band, Blued, Original G.I. Reassembly is started by inserting the ejector and spring. These bolts featured Winchester M2 slides are occasionally found with the 7160091 part number. Please use the forum for other questions. It is stamped PI (Packard Inland) in the well and has the manufactures M2 code D716842. Only Winchester and Inland made the type 5 and type 6 slide. This gave the bullet and hot gasses more time Rating Required. Each part may vary in finish, blued, parkerized, or unfinished / in the white. $15.00 Parkerized M1 Carbine Handguard. Flat face with a 360 degree conical shape. The M2 carbine is a version of the M1 carbine, a lightweight . Features- Can be used and is found on many M1 carbines. Get them here with Numrich Gun Parts - serving the firearms community with hard-to-find parts and accessories since 1950. While the type I extractor can be identified by examination of the extractor while This will fit ANY M1 or M2 Carbine!! One was normal, but the other was a beautiful custom weapon that must have belonged to a flag officer. Due to its simplicity, it has become the most commonly used method to describe part variations. Part markings. The revolutionary .30-carbine 7.62x33mm round pushed a 110-gr. Historians to this day debate and struggle as to how best categorize the M2 carbine. Unlike the undeniably similar Kel-Tec SUB2000, the FPC folds in half laterally rather than vertically; this allows it to . Approximately .04" was removed from the inside of the Model M2 carbine showing the Disconnect Lever engaging the M2 slide. Bob D One of the great things about the .30 caliber Carbines is all parts were interchangeable regardless of who made them or when. That's not my guess..that the actual results of auction. Each differed in the angles at the front of the ejector in an effort to improve ejection. Posted by Michael L Bonomo on Aug 13th 2020. When the The extractor can now be removed, followed by the firing pin. All Rights Reserved. Ordnance documentation has been found that the presence of an X on top of a round bolt approximately 1/2" Get them here with Numrich Gun Parts - serving the firearms community with hard-to-find parts and accessories since 1950. The spring remained unchanged throughout production. Manufactured post WWII. Do not use the forked lever for disassembly as one of the prongs may break. This is HSA or High Standard Arms manufacture from the early to mid 1950's. USGI M2 Carbine operating slide, choice of manufacturer. producing the type II and type III firing pins removed part of the left rear of the firing pins to Sorry, we are unable to offer specific rare parts or manufacturers from this listing at this time. The hammer of the carbine M2 is the same as the hammer of the Ml carbine, except that it has a milled. and added a cam cut to the right side of the slide for the Ask Seller a Question. 100% Original USGI M1 Carbine Hammer Springs NOS from Package in grease Lot of 2 $13.59 Free shipping WW2 US M-1 M1 Carbine Front Sight SI-B marked good condition frontsight IBM $79.95 Free shipping WW2 US M-1 M1 Carbine oiler marked SI large font underwood inland winchester $29.95 Free shipping In today's episode of "I Carry," we have a Smith & Wesson M&P9 M2.0 Metal pistol with a Holosun EPS Red2 red-dot sight carried in a KSG Armory Lexington IWB holster. and lip engaged by the extractor plunger (white arrows). The photos on this page show the slide characteristics both methods use. Model M2 carbine showing the Disconnect Lever engaging the M2 slide. The M1 Carbine modeled here shows the very early production, with a highwood stock with an I-cut, a narrow 2 rivet handguard, early flip-sight, flat-cam slide with narrow arm joint, flat-bolt, push button safety, and narrow barrel band. The M2 included improvements to the rear sight, the addition of a bayonet lug and other improvements off of the M1 design. M2 .30 Carbines' full-auto RPM (rounds per minute) are rated at a fast 750 to 800. concurrent to one another, including by the same manufacturer. During the same month Ordnance had been discussing the end of production for several prime contractors in the near future. Is there a reason why the Inland Type VI Slide is preceded by a D? SG had a contract with Inland to make type 6 slides for them. Copyright 2023 SARCO, Inc. All rights reserved. The M2 included improvements to the rear sight, the addition of a bayonet lug and other improvements off of the M1 design. Two bevel cuts forming a wedge shape. due to a lack of original documentation. replacement parts. M1 Carbine Stock. Price: $119.95. Combat experience with the latter weapon suggested that a provision for fully automatic fire would be useful in certain circumstances - particularly in close terrain such as was frequently encountered in the Pacific theatre of operations. YOU ARE ONLY BIDDING ON ONE SPRING FROM THE ONES SHOWN IN THE PICTURE. that may vary due to a lack of original documentation. Winchester, and Underwood. Smith & Wesson Brands, Inc. has introduced its new folding pistol carbine, the M&P FPC. Add to this each prime contractor and/or their subcontractors were required to produce parts for use as spares for Full automatic fire capabilities were included in the design of the M2 carbine, an upgraded selective-fire version of the M1 released in 1944. Posted by DENNIS RINALDO on Nov 12th 2019. Immediately prior to World War II, the U.S. Refer to the narrative on the M2 slides (below) for additional info on slides marked 7160091. The latter produced what is referred to as the type II extractors. M1 Carbine Spring & Pin Kit. Rating: 100%. Cal. The contractors were aware of these discussions and that it had yet to be decided which contractors. researchers, collectors, and most all authors for reconstructing what was done by who and when. .30 carbine M1A1. New, Old Stock, excellent condition TypeV M1/M2 Inland Carbine Slide. 10mm. The bolt is inserted into the tool from the rear, aligning the pin inside the front Will fit ANY M1 or M2 Carbine!! By contrast, the 7.9233 Kurz round fired by the German StG44 launched a 123-grain spitzer (pointed) bullet at 2,250 feet per second. Ordnance Department appreciated that the advent of paratroopers and fast-moving armored columns meant that rear-line support and . Capacity: 15+1. (w/ Bayonet Lug), Safety Spring & Safety Spring Plunger, Used, Magazine Catch Plunger & Spring Assembly, New, Stock Escutcheon, Early Type I, Used Factory Original, Trigger, G.I., In The Wrap, Unissued (Pack of 10), Trigger Springs, Pack of 10, G.I. If you find a slide not in this chart, please e-mail us at: Throughout production bolts were given a Shop our selection of M2 Carbine parts and accessories today with Numrich. Birch wood. -Winchester: Didn't mark them. Just good quality U.S.G.I. Springs are USGI from WWII. All Rights Reserved. Using similar but less detailed characteristics in use by The Carbine Club, Reisch assigned each an easy to remember single digit number. Review Subject Required. of the tool with the ejector and rotating the solid lever into position between the extractor and extractor plunger. M1/M2 CARBINE STOCK $94.95 Quantity in Stock:6 Product Code: M1C-44B Qty: Description M1/M2 carbine stock with metal. SOME ITEMS ARE ONLY COMPATIBLE WITH USGI SPEC CARBINES, WE DO NOT GUARANTEE COMPATIBILITY WITH REPRODUCTIONS OTHER THAN FA CARBINES. The upgrade was considered a success, however, there were tradeoffs. All Rights Reserved. It comes equipped with three double-stack M&P pistol magazines, including one 17-round and two 23-round mags. Part M&P Pistol, Part Carbine. Insert the firing pin, then the extractor. These were produced in Late WWII from Inland Type IV slides. into it's hole. I will be happy to answer any questions. When engaged in full automatic fire, the T4 model could shoot off 750 rounds a minute while generating a manageable recoil. Before rotating the screw out to release pressure on the plunger, cup one hand around the front of the bolt/tool more info Quick . asks for the distance between the rear of the cam cut and the hole for the slide stop pin. Why would an inspector over-stamp the part number, I mean it is a very bold F stamp? Type I firing pins already in service were to be modified as carbines were inspected by Ordnance personnel by machining a Add to Cart. Displaying products 1 - 12 of 12 results . (1) Hammer. This fits, functions and is correct for all late model Inland M1 and M2 Carbine. Slides modified to this specification do not have the 7161843 part number on them. to it has not provided sufficient details for reconstructing the history of value to researchers, collectors, authors, and historians. Most guns in private hands will be M1, although a few M2 Carbines exist in private hands. Compare specifications of Hi-Point Carbine TS (Target Stock) 10mm 1095TSFDE and Smith & Wesson M&P 10MM M2.0 Thumb Safety Optics Ready Slide 10mm 13388. . Specifications for the Recoil Spring Guide indicated it should be 4.90" in length. This is a late WWII M1 Carbine as manufactured by Winchester that was subsequently converted to the fully automatic M2 configuration. Smith & Wesson Brands, Inc. has introduced its new folding pistol carbine, the M&P FPC. M1/M2 Carbine Accessories. The Carbine Collectors Club has identified nine basic slide variations with several additional uncommon variations. While this has been the easiest to remember and refer There were four variations of the ejector. Item Number: WC-126. Whereas the M1 Carbine was only capable of semi-automatic-fire-only, the M2 variant brought a selective-fire capability with it as well as support for a 30-round, curved detachable box magazine. If the two are intermingled these surfaces should be inspected regularly as wear or damage in these With a seventh footnoted as a variation Rock-Ola produced the allowing enough spring compression for the extractor to move over and around the case rim as the bolt moves forward. The rear of the commercial bolts made by many different manufacturers post WWII were/are not hardened to M&P 10MM M2.0 Thumb Safety Optics Ready Slide. This will fit ANY M1 or M2 Carbine!! 2 Reviews. Operating Slide Spring, New Old Stock, G.I. m2 carbine For Sale 718 Listings Found Page 1 of 24 1 2 3 . The Discussion Forum also serves as a reference desk for the more advanced material that could easily overwhelm a website and is often subject to opinions Shop our selection of M2 Carbine parts and accessories today with Numrich. Ordnance drawing/part number 7161843 was added to the M2 slide. A number of researchers and authors are present on the forums, helping others and seeking information for various research projects. Expect first quality replacements. Appears unused. Comes complete with the slide stop and spring installed.$199 each plus $8.45 shipping. 226 Williams Ln. These changes were to the opening (black arrow) L479 slide with government vendor (CAGE) code 96567 (Dennison Machine Tool) Swivel the forked end of the lever to engage the plunger to hold it and it's spring in place. WE JUST GOT IN 3 CRATES OF NEW UNISSUED SLIDES. The M2 slide (Type VI / L479 B) retained the increased dwell time of the L379 B slide The ejector spring remained unchanged throughout production. Price: $5.00. Ordnance drawing/part number 7161843 was added to the M2 slide. .30 Carbine Rifle Parts, Carbine Hunting Quad Rails, Unbranded Rifle Parts .30 Carbine, Winchester .30 Carbine Rifle Parts, Steel Part Rifle Parts .30 Carbine, GLOCK Pistol Slide & Firing Parts, Slide & Firing Part Pistol Parts, GLOCK GLOCK Slide & Firing Part Pistol Parts, Smith & Wesson Pistol Slide & Firing Parts, The M1 Carbine was a weapon system, in the purest sense. for various research projects. They worked well. All Rights Reserved. Choose your manufacturer below. Corp.) High Standard slides were marked HS, HSA, 28627, or HS and 28627. M2 Carbine Operating Slide, USGI, Choice of Manufacturer . The FPC is a direct blowback carbine with 16.25-inch threaded barrel and integrated folding mechanism. any slide with a wide arm joint for use with the M2 carbine. The most common reason for this type of crack/break is related to the forces exerted on the right bolt lug by the slide. We will contact you as soon as this product is available. Corp.) High Standard slides were marked HS, HSA, 28627, or HS and 28627. M1 Carbine Slide. Comments Required. carbine it was on successfully passed by 3dcart Online Store Creator. This was the case for the round bolt and the four other design changes that accompanied it. We're in good shape when I received them. and/or to increase safety. of the bolt and face of the hammer this was intended to prevent out-of-battery discharges. The screw can then be rotated out and the assembled bolt removed. There are other numbers that would indicate the slide was made for an M2. . The M2 Carbine was a mechanically simple modification of the M1 Carbine to allow fully automatic fire. I have two slides and I cannot find either one in any of the manufacturer's code or stamp references. Should you have questions, assistance is available on our Discussion Forum. In reference to the slides, Riesch's method identifies six slide variations he designated as types I-VI. Order your M2 Carbine schematic and parts today. Good quality part. Some people post stupid prices or have reserves. History looks back upon the M2 carbine as an anomaly of sorts. Insert the plunger and its spring into the recess of the bolt with the plunger oriented with the cutout for the extractor lip M2 Carbine Stock. $6.95. M1/M2 Carbine Slide Stop Spring. Along with the design of the rear To facilitate easy identification of the modified type V slides from the type V slides prior, Ordnance more info Quick view. Be the first to write a review New, Old Stock, excellent condition TypeV M1/M2 Inland Carbine Slide. the pointed right lug, all design changes and added a drainage port under the hole for the firing pin. 1903 or 1903-A3 Butt Plate / Butt Plate Parts, 1903 1903-A3 Bands, Band Parts and Stock Bolts, 1903 1903-A3 Trigger Housing and Trigger Housing Parts, M1 Carbine Slide Lock and Retainer Spring, M1/M2 Carbine Slide Winchester Marked W NOS, M1/M2 Carbine Slide Saginaw Gear Marked SG NOS. The type I firing pin was in use from the beginning of production. L479 slide with government vendor (CAGE) code 28627 (High Standard Mfg. M2 Carbine Slide G.I. with the L379 B slide (below) warrant separating one from the other. . The type I extractor was used from the beginning of production. $9.95. Flat bolts manufactured by National Postal Meter having the pointed lug design appear to have been manufactured in lieu of the round bolt and are absent the other design changes. It is stamped PI (Packard Inland) in the well and has the manufactures M2 code D716842. M1 Carbine > M2 The ejector sits within the hole in the bolt face (bottom right). kaydee, here's some info but check out the site's other stuff too: http://www.billricca.com/drawing_numbers.htm. rearward before the bolt began to rotate and unlock. Looking for an M2 Carbine schematic and parts for your repair or restoration project? M1 Carbine Operating Slide Spring. The purpose of the tang on the rear of all firing pins is to engage a cut in the rear of the receiver bridge More powerful than a submachine gun, it can be considered an assault rifle, despite it firing projectiles considerably less powerful than the StG 44s 7.9233mm Kurz. While many carbines were manufactured as M2s the only real difference between the M1 and M2s was the fire control group they belonged to. Sold Individually. Turn the screw until it is fully extended outward. It's based on the M&P pistol architecture, and it's compatible with full-size and compact double-stack M&P 9 pistol mags. Underwood was contracted post WWII to manufacture round bolts as replacement parts. assembly down into its recess as the bolt moves forward. Two types of slide stops and their associated spring were used. [King Arms] M2 Carbine GBB Rifle[Top GAS Ver.] 10mm. Many M1 carbines sold through DCM and CMP had or have M2 slides and M2 sears, as well as M2 trigger housings. Buyer pays $10.00 for shipping. Caliber: 10mm. In the meantime, there is a great Carbine forum at www.jouster.com They specialize in the M1 but there is a lot of M2 knowledge there as well. stress on the right bolt lug. are available but more expensive than commercial reproductions. Create New Wish List; Description; reviews (4) 4 Reviews 5 M2 slide. Additional springs are $ 4 each. One end of the spring was tapered to fit the protrusion at the rear of the ejector. Order your M2 Carbine schematic and parts today. jacketed bullet to just a bit short of 2,000 feet per second. The chart is followed by the slide portion of the data sheet showing what each by 3dcart Online Store Creator. proof mark. Either can get the job done. Occasionally an M2 slide shows up without the 7161843 marking. The ejector should be rotated punch mark can be observed between the *NOTE THE MARKINGS ON THE LID . to escape before unlocking the bolt. The Carbine Collectors Club. The bevel facing towards the bolt face often varies in size. A lot of the internal parts work on either M1 or M2 and are often found randomly in each type gun. Used at the beginning of production. M1 Carbine, M2 Carbine, M1A1 Schematic w/ Parts List, Buttplate, Used Original G.I. 30 caliber submachine gun developed in the 1940s. Related Items M1 Carbine Slide Lock and Retainer Spring (0) (Good To Very Good Condition), Recoil Plate, Black Plastic, Reproduction (Screw Not Included), Recoil Plate, Type III (Rock Island Arsenal - Marked RIA), Recoil Plate, Type III, Cast (Marked E in a Circle). Overall condition is very good. Description: This is replica of WW2 rifle is Green Gas operated model, which is made from high quality real-wood stock, full length inner barrel, with blow back action. I've watched quite a few videos on youtube, not sure if it would be worth the cost but it sure looks fun. This decrease in width is consistent with The M2 included a heavier 30-round magazine which put greater strain on the magazine catch. Possession of an unregistered M-2 conversion kit, which consists of the following seven parts, constitutes possession of an unregistered NFA firearm; regardless of whether or not assembled; selector selector spring selector lever assembly towards the bottom of the bolt. (SA on this slide identifies the manufacturer as Springfield Armory). into the proper position that will allow the extractor to be inserted in it's hole without being impeded. The carbine was polished and blued, the stock was sanded and . . a frustrating challenge. New, old stock TypeV M2 Carbine Slide. Conversely, the M2 can also be considered a precursor to the modern personal defense weapon (PDW), even though contemporary guns in that category, like the FN P90, fire substantially different cartridges like the 5.728mm. These were produced in Late WWII from Inland Type IV slides. It is also not a method for identifying additional variations beyond the single digit numbers. In 1994, author Craig Riesch, in his book US M1 Carbines: Wartime Production, introduced a different method for identifying the parts and variations. Kingston, NY 12401, 2023 Numrich Gun Parts Corporation. Add to Compare. All Deals . Parts List Sort by: Show Available 0 Schematic w/ Parts List 1 Buttplate Screw 2 Buttplate 4 Slide Lock 5 Slide 6 Slide Lock Spring 7 Recoil Plate Screw 8 Recoil Plate 10 )But the main purpose of this kit is as a replacement component kit for current or future M2 owners. When actual production on the gun began, the decision was made to not include that feature. M1 Carbine Slide, Universal, Late Model w/Out Set Screw, Universal Firearms *Very Good* $64.75. where they will not roll or be bumped as they are easily lost. Authentic originals Used sporadically in 1943 concurrent to the early ejector. Rebuild specifications called for modifying the right side of Featured three bevel cuts on it's face. The extractor spring and plunger sit within a hole inside the right bolt lug (arrow). An M2 housing is the type VI. Having lived in the Market Garden area for 25 years, he has been studying the events for nearly as long. The plunger underwent a redesign early in production. The small notch engaged by the extractor plunger did not reliably retain the extractor within the bolt, occasionally allowing the extractor to be thrown from the bolt by For your NPM the normal range is $700 to $1000. Great slide at a good price!! Click Here. All Rights Reserved. M&P 10MM M2.0 Optics Ready Slide. i see them time to time,always a lot cheaper .i thank there post war.quistion is are they any good. Any interference with the movement of the left bolt lug, such as dirt, grime and/or burrs in the receiver will place M1 - M2 Carbine. When originally designed, the M1 carbine was intended to have only selective-fire capabilities.