This means an A1 model M16/AR-15 rifle will have a LOP (Length of Pull) of 12.875 inches. Expert Grade: Parts are in Very Good condition, may show light scratching. Required fields are marked *. These sets look great but do not have the Original USGI quality. Collectors Grade Buttstock Includes: Complete A1 buttstock with Trap Door. The original 607 handguard, Shipping is taking longer than normal time, 1960's Vietnam era M16 Buttstocks had fixed Rubber Buttplates, Colt M16A2 Stock - Trap Door with hardware, TRAP DOOR M16A1 Matching Furniture Set- With Original Colt Stock Assembly, Colt Matching Furniture Set - M16A1 Trap Door Stock, Colt Fiberglass Stock - Original 1960's - with Rubber Buttplate - AR15 / M16, Colt Triangle Handguards - Original 1960's Fiberglass - AR15 / M16 / M16A1, Triangle Handguards - New!! Remember, all arms and munitions are dangerous. Available in several different colors including: . Just say "NO" to Miss-matching M16 Furniture h, Original Colt AR15 / M16 Stocks from the Vietnam War. TheArmory Upgrade Collectors Grade parts will have almost no blemishes. Includes A1 length buttstock screw and instructions. This "Pencil" profile barrel is the same size and finish as t, C7 (M16A1E1) Upper Receiver. U.S. Collectors Ordnance When the author received his first AR-15 in the early 1980s, for example, he was puzzled to find it was a little heavier than military manuals stated. Ltd. except when noted otherwise. I do however have a problem of my A1 spec buffer tube not fitting inside, although it appears there's residue inside that's fixable. Original Vietnam Era M16A1 early type butt-stock set "without" trap door, with triangular hand-guards and pistol grip. Posted by Dan Baird on Jan 1st 2021 Very pleased came very quickly. Got mine from that shop in Shippensburg that just got in a giant jackpot, so don't count on them anymorethey had a bunch of great stuff, and most of it appeared to be legit surplus. Current Stock: QTY. Many also prefer it because it allows the shooter to more easily assume a "nose to the charging handle" cheek weld" The C1 has a larger trap door compartment than that of other AR15 buttstocks, because the buffer tube channel and trap door compartment are formed in the mold. It also features a fixed sling loop, similar to those seen on the earlier M1 Garand and M14 rifles. Pre-Order only and Expecting them to be going out in July 2022. 2 Finish Options: The A1 stock has an OAL of 9- inches. Show in the image group below is an Armory Upgrade USGI M16A1 buttstock. choice between M16A1 stocks - AR15.COM A fixed-length aftermarket stock that reduces the length of pull to no less than 10 inches may also be installed on an M16A2 or M16A4 rifle or a commercial equivalent rifle. Used, in good condition. You can purchase the Stock only, or the fu, C7 (M16A1E1) Upper Receiver. The new production buttstock is in the same styling as a "Type D" stock, with a rear sling swivel and no trap door compartment. My build is a 'late' M16A1 with birdcage and flashider; had a hell of a time finding a clean trapdoor stock. COMPLETE KITS; UPPER HALVES; BARREL . This means standard A2 rifles will have a LOP of 13.5 inches. REPRODUCTION M16A1 BUTTSTOCK KIT -COMPLETE A1 STYLE BUTTSTOCK KIT INCLUDES A1 LENGTH BUTTSTOCK, RIFLE BUFFER TUBE, RIFLE BUFFER SPRING, RIFLE BUFFER, A1 BUTT CAP SCREW AND A1 POLYMER ONE PIECE BUTT PLATE/TRAP DOOR -STOCK BODY IS HOLLOW POLYMER AND DOES NOT HAVE A FOAM CORE LIKE THE ORIGINAL A1 STOCK -LENGTH OF PULL IS 12.875 -MADE IN THE USA May have rusted Hardware and/or missing Rubber pad. In 1967 the Colt 603 XM16E1 officially became the Colt 603 M16A1, and remained so until the mid-1980, Original US Military stock with Trap Door. more info Quick view. Variations in Early AR-15/M16 Rifle Buttstocks. They didn't really bring the trapdoor in until 1970 or so IIRC, so even the early M16A1's would have had 'D's. M16A1 BUTTSTOCK SET WITH TRAP DOOR - northridgeinc.com It is in its original yellow color. The Colt 601 was fitted with both Type A and Type B stocks. Please continue reading below to learn more about the different lines of M16 parts that we offer. Late 1960's, 1970's & 1980's M16A1 Stocks had a Trapdoor. $70. A surprisingalbeit subtlevariety of fixed polymer buttstocks were used on early AR-15/M16-series rifles. There is more room to store items but not having the foam core produces a different weight and feel than the other two types of buttstocks. AR15/M16A1 Buttstock G.I. with Trapdoor - SARCO, Inc Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Copyright 1996-2023 AR15.COM LLC. New Manufacture M16A1 Short Upper Buttstock Screw $ 4.00 USGI M16A1 Original USGI M16A1 Original Pistol Grip $ 8.00 - $ 48.00 Out of stock M16A1 New Manufacture M16A1 New Manufacture Triangular Handguard Set Rated 5.00 out of 5 $ 54.00 Testimonials All of our USGI parts are hand selected. Did all M16A1's have the trapdoor stock ? - AR15.COM AR15/M16 Buttstock Trap Door Hinge - SARCO, Inc These were used 1959-1968 and have the "Rubber Buttplate" - which was used before the (later) "Trap Door" version (1968+), 1960's Vietnam era M16 Buttstocks had fixed Rubber Buttplates. AR15/M16A1 Buttstock G.I. This tab prevents the rotation of the stock once fitted to a lower receiver. Your email address will not be published. AR15/M16A1 Buttstock G.I. M16 Original G.I. All parts are original USGI. The sling swivel and swivel screw will be reparkarized. As with the later Types C and D, these were foam-filled for rigidity, and featured a rubber butt-pad and a sling swivel that pivoted on a split pin. Used condition. When used to fire rifle grenades, or perhaps even in hand-to-hand combat as an impact weapon, it is easy to imagine a sharp blow to the rifle resulting in a breakage. Save my name, email, and website in this browser for the next time I comment. M16A2 All later Types examined herein have a different contour; the initial departure from the receiver is longer, and at an angle, with a shallower turn towards the toe. This was a "transitional" model since it had a Shell Deflector for left . All of our USGI handguards, buttstocks, and pistol grips are hand selected to match and are correct for all M16A1 and M16-series rifles. Original US Military stock with Trap Door. (The Stock you are looking at now). If you do not have specialist knowledge, never assume that arms or munitions are safe to handle until they have been inspected by a subject matter specialist. If so, then there are a few M16A1 variations that you could do. Did the SP1 always have a trapdoor stock ? | Colt Forum Hence the A1 can be seen as a shorter stock that often fits better for youth or smaller stature shooters. . Collector, Expert, Sharpshooter, Marksman, Your email address will not be published. The lock washer is knurled, barrel marking is different and the A1 flash hider has wrench . According to Ekie's tacked guide, the trap door was introduced in '69. These representatives will help ease the extensive licensing and shipping complications associated with purchasing products from our U.S. website. Dimensions. Additionally, it uses an A2 sling swivel screw instead of the A1. Colt 604 M16 Upper Assembly, 20" Government Profile Barrel, Slickside Bolt Assembly, No Ejection Port Cover, 5.56 NATO *Good* Add to Cart. Used, in good condition. C1 Buttstock - cavmfg.com 10.5 5.5 1.5 in. with Trapdoor. AR15/M16 Complete A2 Buttstock . Instead of a reddish-brown resin (typically painted, or sometimes dyed, black), the Type C was produced with a black polymer from the outset. Overall QC could be a bit better, but very good stock! (The Buttstock you are looking at now). $3.00 more info Quick view Add to . See the 2nd picture. M16A1 would have had the trapdoor stocks. Learn how your comment data is processed. Used, in good condition. M16A1 BUTTSTOCK SET WITH TRAP DOOR Our Price: $179.00 Quantity in Stock: (Out of Stock) Product Code: M16-2 Qty: Description Early M16A1 buttstock set with trap door, triangular handguards and pistol grip. All Rights Reserved. This. The foam core is noticeable on this set and is painted black to match the rest of the buttstock. In order to restore balance to the rifle for long-range off-hand (standing) shots, competitors sometimes filled the butt compartment of the rifle with cast-lead weights (see Figure 1.5). more info Quick view. All Rights Reserved. $55.00 A2 buttstock, stripped with buttplate: $39.00 CHOOSE COLOR . Stripped M16A1 Trapdoor buttstock Grade A $70.00. Under staffed? Until today there were two different reproduction M16 Tri, A nice reproduction of the Colt/Diemaco FiberLite Stock. $59.95. The same butt-stock must be used for all stages of a competition. About Our M16A1 Parts - U.S. Collectors Ordnance (The Stock you are looking at now) Late 1960's, 1970's & 1980's M16A1 Stocks had a Trapdoor. The upper receiver did not have any forge codes at that time. [ARCHIVED THREAD] - choice between M16A1 stocks. *Must have a registered ARFCOM account to win. Shiny mottled appearance, intact butt pad just needs cleaning. $69.00 - $142.00 . 1960's Vietnam era, We offer 5 different grades of authentic Colt M16 Pistol Grips: VIETNAM ERA M16A1 BUTTSTOCK SET WITHOUT TRAP DOOR Original Vietnam Era M16A1 early type butt-stock set "without" trap door, with triangular hand-guards and pistol grip. $110, TheArmory Upgrade SharpshooterGrade parts might have small dings here and there and might not be as smooth as the higher grades. The differing weights of the various Types is notable. so all of mine have type D stocks and my only non Air Force rifle clone is a H&R which used type D,s. Save my name, email, and website in this browser for the next time I comment. Marksman Grade: Parts are in Good condition, may show a fair amount of scratching or dings. Genius Ecommerce by 1Digital. Decrease Quantity: . If you are going to use a three prong flash hider use the non-trap door stock. As I said before this might be over simplification but. The sling swivel can be offset to either left or right in addition to straight down. Used condition. Type 'D's just feel better to me, and are lighter from what I can tell. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. 1960's Vietnam era M16 Buttstocks had fixed Rubber Buttplates (Here), 1970's & 1980's M16A1 models had a Trapdoor. Share your knowledge of this product. I no longer have any E's FWIW. TNVC/NGI Giveaway: 15 winners with over $7000 worth of prizes!! I'm very happy with this stock. These handguards, buttstocks, and pistol grips are all Original USGI and have not been modified. GM and H&R both used type D stocks during their contract production through '71, FWIW. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Interestingly, with the passage of time, the butt-trap was put to an entirely different use. Collectors Grade: Parts will have almost no blemishes. Show in the image group below is an Original USGI M16A1 buttstock. So I picked up a ruff ISSUED M16A1 BUTTSTOCK AND TRIANGLE - AR-15 The site owner may have set restrictions that prevent you from accessing the site. These have been sitting around for sometime and have rust on the metal insert. Trapdoor works easily. BROWNELLS AR-15 RETRO BUTTSTOCKS | Brownells - A Retro Rifles Exclusive!! It is easy to miss this difference unless one can see them side-by-side (see Figure 1.2). Includes buttpad. An M16A1 rifle (short) butt stock or pistol grip or its commercial equivalents may be installed in lieu of the M16A2 or M16A4 butt stock or pistol grip. U.S. M16 / M4 - APEX Gun Parts Colt M16A1 Buttstock - Trap Door - Retro Rifles Used M16A1 Stock w/ Trapdoor - Venture Surplus Complete A1 buttstock with Trap Door. This site uses Akismet to reduce spam. Stock Sets Used, in good condition. These butt stock assemblies were pulled from Vietnam-era M16 A1's. Full auto rated and battle tested, our M16 parts will add a touch of wartime history to your next AR or M16 build. Rest assured, you will still benefit from our vast product selection and industry-leading customer service. Posted: 11/21/2013 8:23:23 AM EDT [#3] Use what makes you happy. USGI M16A1 Armory Upgrade and Original Repaired Handguards. For a listing of our Brownells Europe representatives. Mainly fitted to the Colt 602, the Type C buttstock was the final Type made using the early manufacturing methods and materials, differing from the Type B only in colour. Whilst the Types B through E have the same general shape, the Type A had a very short, straight horizontal section at the lower side of the wrist of the stock, which transitions with a relatively sharp curve before following a straight line to the toe of the stock. . Out of stock. $59.95. The sling swivel slot is cut out differently for adjustable use of the sling. Colt Triangle Handguards - Original 1960's Fiberglass - AR15 / M16 / M16A1, Colt Matching Furniture Set - AR15 / M16 - Original 1960's, Colt Triangle Handguards - (1960-1967) "Gloss" - AR15 / M16, Colt "Bakelite" Pistol Grip - AR15 / M16 / M16A1, Colt Pistol Grip - "Refurbished" - AR15 / M16 / M16A1, Triangle Handguards - New!! Buy, Sell, and Trade your Firearms and Gear. Any use of this content without express written consent is prohibited. Ori. Buttstock will include a like new USGI buttplate housing and a USGI aluminum trap door. The C1 is an A1 length (5/8" shorter than an A2 stock) and shape fixed buttstock. Grade D- Back End Damage- last 1/3 of the stock has damage to it. with Trapdoor. This was a "transitional" model since it had a Shell Deflector for left, From Retro Rifles - XM16E1 (1964-67) or M16A1 (1967-mid 80's) Upper receiver, Barrel and Fro, After initial testing of the Model 601, the US Army asked for a number of changes - resulting in the, The Colt 603 XM16E1 is the last version of the "experimental" series before official adoption of the, Shipping is taking longer than normal time, Grade A - Used, good condition, excellent or new Sling Swivel Assembly Hardware, Numbered - Similar to above, but with original Arms Room numbers still on the Stock, excellent or new Hardware. Buttstock does not come with short upper buttstock screw. These hand guards were issued by the US military and show signs of use and have fading of color from use. The sling swivel and swivel screw will be reparkarized. Springfield `Scant` stock type 12 semi-pistol grip WWII and post war field replacement stock that will fit the M1903 and M1903A3 rifle. I'm just looking for the effects of a basic-issue M16A1, Vietnam era. If you're going to abuse it, I'd recommend the Type D. The trap door on the Type E may break on you, but the rubber buttpad on the D will probably outlive you. Posted by Albert Young on Mar 13th 2021 The stock looked great - no scratches or dents. AR15/M16A1 Buttstock G.I. In 67,68,and 69 I only saw type D stocks But then I was in the Air Force and all of our 604s had type D,s. COLT TEAR DROP FORWARD ASSISTS GRADE 1 AND GRADE 2 BOTH ARE REAL NICE AND INCLUDE EVERYTHING YOU NEED TO INSTALL THEM. Whilst the foam vent hole is also present on the located tabs of the Types A and B, those can be distinguished by their shape (A) and material (A & B), as noted previously. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Sold Individually. We offer 2 options, Original US Military Buttstock with Trap Door. The New Manufacture buttstock is shown in the image group below. Genius Ecommerce by 1Digital. There are only minor imperfections, resulting in almost brand new looking M16A1 parts. Concur that the 'Ds are a lot easier to find, and cheaper. Complete M16A1 buttstock with Trap Door, Triangular Handguards, and Pistol Grip. I use the type d stocks on most of my builds, and the type e trapdoors on anything that I'd put an A2 stock on, because I like the shorter A1 stocks. Cracks within the first third of the stock from the receiver. 1:12- Some in stock It is tempting to see the addition of a butt-trap as simply a change in keeping with traditionindeed, every U.S. military rifle issued since the adoption of the Springfield Model 1892 (KragJrgensen) had featured cleaning tools or supplies housed in the buttstock. M16A1 Trapdoor Buttplate- Rubber - Retro Rifles Any use of this content without express written consent is prohibited. M16 Original G.I. Of course, the upper receiver forge codes can dictate which variation. Collectors today know them as the Type A through Type E. I use the type d stocks on most of my builds, and the type e trapdoors on anything that I'd put an A2 stock on, because I like the shorter A1 stocks. . The stock looked great - no scratches or dents. These also work on the A2 Buttstock and eliminate the "Meat Tenderizer" effect of A2 Buttplate. One new winner* is announced every week! Examples weighed by the author indicated a nominal mass of 285 g (10.05 oz) for the Type A, 280 g (9.88 oz) for the Type C, 340 g (12.00 oz) for the Type D, and 375 g (13.23 oz) for the Type E. The noticeable change in weight from the Types AC to the Types D and E may account for some of the reports of rifles not matching nominal weights in the literature. The easiest way to identify a Type C stock from its successors is to check for a foam vent hole in the locating tab (see Figure 1.3). When you say M16A1 buttstock, are you referring to the E Type with the trapdoor? Expert Grade Buttstock Includes: Required fields are marked *. Copyright 1996-2023 AR15.COM LLC. AR15/M16A1 Buttstock G.I. Grade D - Swollen End or missing Rubber pad (Completely functional) works for those wanting a nice stock to cut down for 607 or other builds. These buttstocks have been stripped of all metal parts. As said before, use what you prefer and looks best to you. The Collectors Grade buttstock will come with a USGI aluminum trap door assembly also. Buttstock will include a New Manufacture M16A2 buttplate housing and a new plastic trap door. COLT M16/AR15// COLT FORWARD ASSITS, NEW AND USED COLT PARTS. Comes with hardware inclu, Once in a lifetime Opportunity to get a Pristine Matching Furniture Set with Trapdoor stock. There should be only minor imperfectionsfor an almost brand new lookingM16A1 parts. The Collectors Gradebuttstockwill come with aUSGI aluminum trap door assembly also. It seems likely that this wasat least in parta result of the changes to buttstock manufacturing techniques and materials outline above. USGI M16A1 Original Furniture Set Type E Buttstock Always assumed that the trapdoor buttstock, and cleaning kit contained therein, were one more way to drive home the point that the AR platform did, indeed, require maintenance. Sharpshooter / Marksman Grade Buttstock Includes: . Colt Fiberglass Stock - Original 1960's - Retro Rifles You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers. Assembly does not include buffer tube or other hardware. Collectors Grade Buttstock Includes: 4 AR15/M16A1 Stock is a Good Value. Any aftermarket stock must have the same external characteristics as the A2 or A1 stocks except for the shorter length. M16A1 Buttstock, Type D, With solid Buttplate, no sling swivel, in *Good* condition. Collectors Grade: Parts show almost no wear or use, like new. Buttstock will include a USGI buttplate housing and a new plastic trap door. Original US Military Buttstock with Trap Door. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. None of our parts that we sell have cracks or missing teeth. It is noticeably heavier than the prior Types, and is the pattern used on U.S. Air Force M16 rifles (Colt 604), and early M16E1 rifles (Colt 603) as used by the U.S. Army. Just my .02 and worth exactly what you paid for it. To make the shopping experience with Brownells better, we have a number of representatives in Europe. Buttstock with Lower Receiver Extension, M16A2 Used Buttstock with Butt plate and Swivel, AR15/M16A1 Right Hand Triangular Handguard, New, AR15/M16A2 Buttstock,Buttplate And Swivel. A1 Trapdoor? - AR15.COM Add to Cart. Type D would have been found on the XM16E1. AR15/M16 A1 Buttswivel screw. Our Price: $49.95 . Our Price: $19.95 . 5 of 5 stars, used of course, glad to have it. (Most manufacturer's A1/A2 buttplate assemblies will work with the C1.). I may be over simplifying this but, (and I've even been thinking about doing this) if you are going to use a bird cage flash hider, I would use the trap door stock. COMPLETE A1 STYLE BUTTSTOCK KIT - Ar15Sport 2 Finish Options: From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. - A Retro Rifles Exclusive!! Vietnam Era M16a1 Buttstock Set Without Trap Door These are type E buttstocks, found on the Colt 603/M16A1 and some later 1969+ models. I bought this stock for a retro M16 I'm trying to make and like the used but not completely battered look. Minimal, Original Colt M16A1 Trapdoor Matching Furniture Set Requested URL: www.brownells.com/gun-parts/rifle-parts/rifle-stocks-parts/ar-15-retro-buttstocks/, User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36. M16A1 Buttstock with Trapdoor Used Good Condition $14.95 SN-622 AR15/M16A1 Stock Set-No Trapdoor Early Triangular Handguard, Pistol Grip, Early Type Buttstock w/no trap door in Used Good Condition $19.95 SN-18 AR15/M16A1 Stock Set-With Trapdoor M16A1 BUTTSTOCK SET WITH TRAP DOOR M16 A2 BLANK . Copyright 2023 SARCO, Inc. All rights reserved. Grade 1 colt tear drop Forward assist these are new old stock and sold as a kit, which means pin and spring and it does include shipping. Copyright 2013-2023 Cavalry Manufacturing. Copyright 2021 by Armament Research Services Pty. A1 buttstock, complete with buffer & spring - OUT OF STOCK New Manufacture. On the earliest Type A stocks, the sling swivel could fully rotate, however these were quickly changed to the more common split pin and are rare today. Collapsible stocks of the type used on M16 M4/M4A1 Carbines are not permitted. Show in the image group below is an Armory Upgrade USGI M16A1 buttstock. with Trapdoor. M16 Original G.I. more info Quick view. Expert Grade: Parts will have very few blemishes.Sharpshooter Grade: Parts might have small dings here and there and might not be as smooth as the higher grades. ** This page is for the "BAKELITE" Pist, ** This page is for the Black "REFURBISHED" Original Colt Grips ** Dummy and Inert Grenades, Mortars & Rockets, Cleaning Supplies, Cleaning Rods and Oilers, 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, AR15/M16A2 Buttstock,Buttplate And Swivel, M16A2 Used Buttstock with Butt plate and Swivel, M16 Original G.I. For the buttstock that uses a trap door. Options. M16A1 Trapdoor Stock- Stripped. M16 A1/A2 SCOPE MOUNT RAIL. You can purchase the Stock only, or the fu, 1:14-Backordered Here's a picture of the barrel markings on my M16A1 upper assembly. M16A2 Treat all firearms as if they are loaded, and all munitions as if they are live, until you have personally confirmed otherwise. $150, TheArmory Upgrade Expert Grade parts will have very few blemishes. Colt M16A2 Stock - Trap Door with hardware - Retro Rifles D type butt stock. They can be bitten, cut, chunked and torn, and if you shoot enough, they'll wear smooth, but they do last! Buttstock with Lower Receiver Extension . Used, in good condition. Be the first to write a review This was a "transitional" model since it had a Shell Deflector for left, From Retro Rifles - XM16E1 (1964-67) or M16A1 (1967-mid 80's) Upper receiver, Barrel and Fro, The Colt 603 XM16E1 is the last version of the "experimental" series before official adoption of the. more info Quick view. Used, in good condition. Cleans up good with a small wire brush. This stock has a chip out of the right side, toward the receiver end (as pictured). The shorter length of pull makes it well suited for use with heavy clothing, body armor, and by shooters of smaller stature. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. with Trapdoor. 1960's Vietnam era M16 Buttstocks had fixed Rubber Buttplates (Here) 1970's & 1980's M16A1 models had a Trapdoor. I'm very happy with this stock. M16a1 Buttstock Assembly, Type E, A2 buttplate, With Lower Receiver M16A1 Buttstock, Type D, With Buttplate, *Good* - APEX Gun Parts Original US Military stock with Trap Door. Until today there were two different reproduction M16 Tri, 1:14-Backordered Original Colt AR15 / M16 Stocks from the Vietnam War. The one I fired in 68 was a d type stock and all that I saw at Danang in 69 were 604,s. New old Stock U.S. M16-A1 Buttplate. Armory Upgrade handguards,buttstocks, and pistol gripsare created by repairing lightlyblemished originalUSGI M16A1 parts. There are five basic types, although it does not appear that these ever received unique manufacturers designations. Armory Upgrade handguards, buttstocks, and pistol grips are created by repairing lightly blemished original USGI M16A1 parts. AR15 LOWER PARTS KIT. 16 oz. Black, Refurbi, NEW! As the weapon saw increasing use after its introduction, deficiencies were corrected by incorporating more robust furniture, however the mass specification was not updated in newer manuals. Original Colt AR15 / M16 / M16A1 Fiberglass & Bakelite Furniture Sets from the Vietnam War Era. Ori, We offer 5 different grades of authentic Colt M16 Pistol Grips: The Collectors Grade buttstock also comes with a USGI aluminum trap door assembly. In rule 6.2.3 "U.S. Rifle, Caliber 5.56 mm, M16" starting on page 29 of the 2014-2015 Competition Rulebook, it describes the rules for M16/AR15-style service rifle buttstocks: An M16A1 rifle (short) butt stock or pistol grip or its commercial equivalents may be installed in lieu of the M16A2 or M16A4 butt stock or pistol grip.