Bcm lower mk2.

Aero Precision AR15 Complete Lower FDE W/A2 Grip M4 Stock. $314.99 LMT AR-10 Lower MARS-H Stripped . $485.00 Manufacturer. ADM; Aero Precision; Aimpoint; B5 Systems; BCM; Benelli; ... BCM MK2 Standard 14.5" Mid Length (ENHANCED Light Weight) URG w/ MCMR-13 Handguard Pinned MOD3 Comp. Your Price: $845.00

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BCM Lower Group w/MK2RMS-M1T0 & BCMGUNFIGHTER Stock Mod-0-SOPMOD (Wide-body) - Flat Dark Earth - Utilizes the BCM MK2 Receiver Extension, MK2 buffer, and rifle M16 action spring. The MK2 receiver extension is approximately 3/4'' longer than the standard 6 position extension. LMT is the way to go. As far as upper receivers go, I always build guns with matching receiver sets. So I would recommend an LMT upper receiver and BCM everything else if that's the route you want to go. I'm just chiming in to help some that may need this info. The MARS-L is not compatible with BCM MK2 upper receivers.Buy BCM® MK2 BFH 14.5" Mid Length (ENHANCED Light Weight) Upper Receiver Group w/ MCMR-13 Handguard Online from our collection of brand new Bravo Firearms for ... 2.0 MOA Adjustable Red Dot with Lower 1/3 Co-Witness Mount $ 544.00; Aimpoint® ACO (Aimpoint Carbine Optic) $ 399.00; Cart. Description; Reviews (0) BCM® MK2 BFH 14.5″ Mid Length ...Upper: BCM Mk2 16" BFH ELW upper Light setup: Modlite PLHv2 + Surefire DS00, SR07 Optic: T2 + G33 Lower: Radian AX556 ADAC Lower + Talon Trigger: Geissele SD3G Buffer setup: VLTOR A5 Stock: B5 SOPMOD Enhanced Misc: FCD Rail panel + FA, Geissele SCH, Emissary Handbrake, Surefire 3 prong Pistol: Glock 17 ...BCM ® LOWER RECEIVER. Receiver Machined from Aluminum Forgings 7075-T6, Hardcoat Anodized (per MIL-A-8625F, Type III, Class 2) Low Shelf for RDIAS Installation - Installation of a registered drop-in auto sear allows weapon to fire on full automatic. Low Shelf for Accuwedge use. Fire Controls Marked SAFE and SEMI. BCM ® Milspec 7075 …

The BCM Stocks (SOPMOD type) have more pronounced cheekwood, snag free design, and two ambidextrous sling mount options. ... BCM® MK2 Upper Receiver Groups; Cosmetic Blem Upper Groups; 20" Rifle Upper Group; 18" SPR Mk 12 Upper Half; 18" Rifle Upper Group; 16" M4 Carbine Upper Group; ... AR-15 Lower Parts . All AR-15 Lower …April 15, 2022 By D. Faubion. Think it's hard to improve perfection? BCM did just that by bringing the AR's upper receiver into the modern era. Compared to the standard flat-top receiver, BCM's new MK2 upper features notable advances without increasing weight. How'd they do it?

The Griffin MK2 Ambi Lower is the ideal foundation for your next rifle build. Precisely machined from high-grade 7075-T6 aluminum to exact tolerances, the MK...

The BCM Stocks (SOPMOD type) have more pronounced cheekwood, snag free design, and two ambidextrous sling mount options. ... BCM® MK2 Upper Receiver Groups; Cosmetic Blem Upper Groups; 20" Rifle Upper Group; 18" SPR Mk 12 Upper Half; 18" Rifle Upper Group; 16" M4 Carbine Upper Group; ... AR-15 Lower Parts . All AR-15 Lower …BCM® MK2 11.5" carbine upper receiver group. This AR15 upper comes with a 11.5in barrel, a 10in Quad Rail handguard (QRF-10), & your choice of muzzle device. ... AR-15 Lower Parts . All AR-15 Lower Parts; AR15 Lower Parts Kits; Tactical Triggers; Trigger Guards; AR15 Misc Lower Parts; Stocks and Grips . All Stocks and Grips; Stocks . BCM ...After using multiple uppers I’m the service and as a civilian I can say the BCM Mk2 uppers are my fav, the extra rigidity in place needed makes for a great bug out/end of the world upper ahha. Paired with a match grade barrel and upgraded gas system, the lightweight MCMR rail makes the upper feel so light. This is my new fav upper.16in. Barrel Style: Standard. Handguard: MCMR-15. BCM® Bolt Carrier Group: None BCM® Bolt Carrier Group (MPI) (Auto) (included FREE w/ Upper Receiver Group, Special Limited Time Offer) BCM® Charging Handle: None Ambi MK2 Handle (LARGE) +$89.95 Ambi MK2 Handle (MEDIUM) +$89.95 Asym MK2 Handle (LARGE) +$74.95 Asym MK2 Handle (MEDIUM) +$74.95 ...Buy BCM® MK2 Standard 12.5" Carbine Upper Receiver Group w/ KMR-A10 Handguard Online from our collection of brand new Bravo Firearms for sale. We ship to your ... Trijicon MRO-C-2200006: Trijicon MRO™ - 2.0 MOA Adjustable Red Dot with Lower 1/3 Co-Witness Mount $ 544.00; Aimpoint® ACO (Aimpoint Carbine Optic) $ 399.00; Cart. Description;

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BCM® Enhanced Lower Parts Kit for your AR15 Lower Receiver. This kit includes all the Mil-Spec quality components you have come to expect from BCM, along with some fantastic upgrades to include; BCM PNT Trigger Assembly. BCM Pistol Grip, Mod 3. BCM Enhanced Trigger Guard. In a commercial market flooded with imported and low quality Mil-Spec ...

The mk2 is bravos own and stronger upper. It's stronger but only in ways that make no practical difference. A milspec upper receiver will go hundreds of thousands of rounds before the cam path wears out. One of the benefits BCM claims for the MK2 is enhanced rigidity leading to fewer bolt lug failures due to misalignment with the barrel extension. AR-15 Lower Parts . All AR-15 Lower Parts; AR15 Lower Parts Kits; Tactical Triggers; Trigger Guards; AR15 Misc Lower Parts; Stocks and Grips . All Stocks and Grips; Stocks . ... BCM. BCM® MK2 Standard BLACK 16" Mid Length Complete Upper Receiver Group w/ MCMR-13 FDE Handguard. MSRP: $996.39 Your Price: $773.45. In Stock.I would go BCM MK2 or PWS MK1. Even though I have beef with John Sharps right now, take a look at Sharps Bros SBUR03. The bolt catch cut may be just perfect for the ADM's catch and the front of the upper is flush with SLR rails for a seamless upper/rail transition. ... Hell the only reason I went to ADM lower was simply due to the bolt hold ...The BCM Mod 3 AR15 pistol grip gives you improved ergonomics, a wider grip than Mod 0 or Mod 1, water-resistant storage inside the grip, and more. ... BCM® MK2 Upper Receiver Groups; Cosmetic Blem Upper Groups; 20" Rifle Upper Group; 18" SPR Mk 12 Upper Half; ... AR-15 Lower Parts. Gunfighting Links American Gunfighter Films Gunfighters. BCM ...Reply. ButterscotchSevere45 • 11 days ago. Have a BCM lower and several aero lowers they're really about the same. The aeros have a slightly more flared magwell. Reply. Adorable-War-991 • 10 days ago. I've always considered BCM a notch above aero. Given the choice I'd go BCM. Reply.I have the 14.5 BCM ELW-f with the Gunfighter Mod-1 brake attached, and a 13" KMR rail. I use an Aimpoint T-1 and MagPul MBUS for sighting. A Surefire X300U at 12 0'clock. Instead of the BCM stock, I went with the MagPul MOE SL and a VCAS sling. My lower is a BCM lower with a Geissele SSA trigger.The BCM Recce 16 is an AR-15 in 5.56 x 45mm from one of the most prestigious manufactures in the industry. This rifle is a great choice for shooters looking for a reliable and rugged option. BCM 15" MCMR Free Float Handguard; BCM Mod 0 - SOPMOD Stock; BCM M-LOK QD Sling Swivel Mount; BCM Mod 4 Charging Handle; BCM Mod 0 Compensator; BCM Mod 3 ...

AR Stripped Lower Receivers AR Complete Lower Receivers Handguns Rifles California-Legal Rifles Shotguns NFA Items Other Used Firearms Gunsmith Services ... BCM BCM4 MK2 BFH ELW 16" ML URG w/ MCMR-15 Handguard, Black $1084.55 $855.99. In stock. BCM BCM4 MK2 BFH ELW 14.5" ML URG w/ MCMR-13 Handguard, Black ...BCM ® 300 BLK Recce 9 ... BCM ® LOWER RECEIVER. Receiver Machined from Aluminum Forgings 7075-T6, Hardcoat Anodized (per MIL-A-8625F, Type III, Class 2) Low Shelf for RDIAS Installation - Installation of a registered drop-in auto sear allows weapon to fire on full automatic. Low Shelf for Accuwedge use.BCM® MK2 11.5" carbine upper receiver group. This AR15 upper comes with a 11.5in barrel, a 10in Quad Rail handguard (QRF-10), & your choice of muzzle device. ... AR-15 Lower Parts . All AR-15 Lower Parts; AR15 Lower Parts Kits; Tactical Triggers; Trigger Guards; AR15 Misc Lower Parts; Stocks and Grips . All Stocks and Grips; Stocks . BCM ...Home / Lower Receiver Parts / BCM MK2 BUFFER. BCM MK2 BUFFER $ 35.99 - $ 72.99. T0 3.8oz; T1 4.7oz; T2 5.6oz; T3 6.5oz; T4 7.4oz; weight: Clear: BCM MK2 BUFFER quantity. Add to cart. SKU: N/A Category: Lower Receiver Parts. Specifications. Lessens felt recoil without compromising reliabilityAbout the BCM® Mk 12 Mod 0-Bravo. Features included: · BCM Bolt Carrier Group (HPT/MPI), auto · BCM MK2 Charging Handle · BCM Mod 2 Stock · BCM Mod 4 Pistol Grip · BCM MK2 Recoil Mitigation System · BCM SS410 18" Stainless Barrel, Ionbond Black DLC · AE MK12 Comp · Rifle Length Gas System

BCM MK2 upper, looking for recommendations for ambi lower. Got a 14.5 BCM MK2 upper and am looking for a lower for it. I read LMT won't work with them, am left handed so ambi would be great. Thanks. I have an 11.5 BCM Mk2 on a Radian lower, highly recommend. I'll look into those... maybe there's stock.

This BCM Enhanced Lower Parts Kit includes: 1. BCM PNT Hammer 2. Hammer Spring 3. BCM PNT Trigger 4. Trigger Spring 5. Hammer/Trigger Pins 6. Disconnector 7. Disconnector Spring 8. Bolt Catch 9. Bolt Catch Plunger 10. Bolt Catch Spring 11. Bolt Stop Pin 12. Rear Pivot Pin 13. Buffer Retainer 14.Be the first to know about new products, special offers and BCM news. Improving on Mil-Spec rail interfaces dating back over 30 years, the BCM A/T mount delivers an unprecedented zero retention on a properly mounted red dot optic. Low profile and snag-free, BCM A/T Mounts are built with a minimal number of components - delivering a stronger ...BCM® MK2 Standard 16" 300 BLACKOUT Complete Upper Receiver Group w/ MCMR-15 Handguard. MSRP: $1,116.50. Your Price: $861.49.I mated the upper with a BCM lower I bought separately and they fit perfectly together. I have bought other BCM uppers and lowers and they all performed very well. ... BCM. BCM® MK2 BFH 16" Mid Length (ENHANCED Light Weight) Complete Upper Receiver Group w/ KMR-A15 Handguard. MSRP: $1,084.55 Your Price: $855.99. In …About the BCM® Mk 12 Complete Upper Receiver, Mod 0-Bravo (PRI Natural) Features included in basic price: PRI Gen III 12" Carbon Fiber Handguard (Natural Finish) PRI Folding Front Sight Base; BCM® SS410 18" Barrel, Polished Stainless; Rifle Length Gas System; BCM® Bolt Carrier Group (HPT/MPI), auto BCM US Patent #10415907 . This kit contains all the necessary parts to mount to your Mil-Spec dimension stock assembly to your Mil-Spec lower receiver. MK2 Mod 1 - T2 Buffer (weight = approximately 5.6oz) Mil-Spec M16A4 rifle action spring; Mk2 Receiver Extension (approximately 3/4” longer than carbine), 7076T6, 8 position, Mil-Spec diameter Aero Precision AR15 Complete Lower FDE W/A2 Grip M4 Stock. $314.99 LMT AR-10 Lower MARS-H Stripped . $485.00 Manufacturer. ADM; Aero Precision; Aimpoint; B5 Systems; BCM; Benelli; ... BCM MK2 Standard 14.5" Mid Length (ENHANCED Light Weight) URG w/ MCMR-13 Handguard Pinned MOD3 Comp. Your Price: $845.00BCM US Patent #10415907. This kit contains all the necessary parts to mount to your Mil-Spec dimension stock assembly to your Mil-Spec lower receiver. MK2 Mod 1 - T1 Buffer (weight = approximately 4.7oz) Mil-Spec M16A4 rifle action spring. Mk2 Receiver Extension (approximately 3/4" longer than carbine), 7076T6, 8 position, Mil-Spec diameter.

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This AR-15 lower comes fully assembled and ready to attach to any Mil-Spec complete upper. The receiver is forged from 7075-T6 aluminum and hardcoat anodized black and features an enlarged polymer trigger guard already installed. Additionally, this complete AR lower features a BCM grip, Mod-0 SOPMOD stock, and the MK-2 buffer system.

When it comes to building an AR-15, the lower receiver is a crucial component. After extensive research, I decided to invest in the Bravo Company Manufacturing Complete AR-15 Lower Receiver with MK2 & Mod-1 SOPMOD Stock. In this review, I will discuss the features, performance, and overall value of this product. Let's dive in! FeaturesIn this video we are joined by Daniel Richardson from Richardson Precision, Larry and Daniel review Daniel’s MK2 upper compared to a Gen 1 BCM upper. Head ov...Aero Precision AR15 Complete Lower FDE W/A2 Grip M4 Stock. $314.99 LMT AR-10 Lower MARS-H Stripped . $485.00 Manufacturer. ADM; Aero Precision; Aimpoint; B5 Systems; BCM; Benelli; ... BCM MK2 Standard 14.5" Mid Length (ENHANCED Light Weight) URG w/ MCMR-13 Handguard Pinned MOD3 Comp. Your Price: $845.00BCM Lower Group w/MK2RMS-M1T0 & BCMGUNFIGHTER Stock Mod-0-Flat Dark Earth - Utilizes the BCM MK2 Receiver Extension, MK2 buffer, and rifle M16 action spring. The MK2 receiver extension is approximately 3/4'' longer than the standard 6-position receiver extension. Receivers Machined from Aluminum Forgings 7075-T6.Lower Receivers; Lower Parts; Upper Parts; Also in AR-10: Barrels; Bolt Carrier Groups; Charging Handles; Handguards; Muzzle Devices; Kits; Shop all AR-10 . AK-47 ... BCM MK 2 Laser Engraved AR-15 Upper Receiver, Black - BCM 4-UR-MK2 UPPER ASSBY FLATT. Details; SKU: 795506: Model Number: BCM 4-UR-MK2 UPPER ASSBY FLATT: Brand: BCM: UPC ...Bullying, it seems, pays off. Did you ever wonder why the bully gets away with it and even benefits with a pro Bullying, it seems, pays off. Did you ever wonder why the bully gets ...MK2 SBR 8.5" MCMR GBBR BCMAIR® Licensed Series GBBR >> BCM MK2 MCMR GBBR More Detail . 2023 Hot Release BCM MK2 MCMR TWO TONE BCMAIR® Licensed Series GBBR >> BCM MK2 MCMR GBBR More Detail . HOT RELEASE 2021 BCM® MCMR 11.5" GBBR VF2-LBCM_MCMR_S-BK01 BCMAIR® Licensed Series GBBRIf you've found yourself in the AR market for the first time and don't mind spending a little bit more for a rifle that's firmly a few steps above entry-level, we have a feeling you're going to be pretty stoked on the BCM Recce-16 AR-15. BCM Recce-16 MCMR AR-15. $1,559. at Brownells. Prices accurate at time of writing. Can anyone confirm if a BCM MK2 BFH upper can fit with LWRC M6IC lower? I think I’ve found pics of this setup online but I’ve also read a thread here saying that there may be some fitment issues. Any insight from someone who may be running this setup would be really appreciated. Edit: we have confirmed that this pair will not fit together ... MK 2 RECEIVER OPTIMIZED The U.S. patents pending BCM Mod 3 Charging Handle now features upper and lower and side exhaust channels to vent gas from the chamber away from the shooter during operation of the weapon. While these channels are optimized for the BCM MK2 Upper receiver, they still provide improved gas diversion on all Mil-Spec upper ...BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. The barrels are MP inspected with both circular and longitudinal magnetic fields per ASTME1444-01 (current Mil-Spec) to assure a high quality finished product. All BCM barrels are marked HP MP as our proof load marking.

This BCM Enhanced Lower Parts Kit includes: 1. BCM PNT Hammer 2. Hammer Spring 3. BCM PNT Trigger 4. Trigger Spring 5. Hammer/Trigger Pins 6. Disconnector 7. Disconnector Spring 8. Bolt Catch 9. Bolt Catch Plunger 10. Bolt Catch Spring 11. Bolt Stop Pin 12. Rear Pivot Pin 13. Buffer Retainer 14.Bravo Co. AR-15, 5.56, MK2 BFH 16" Complete Upper, BCM multi lower, w/ Trijicon MRO, Mags, more. $1500. BCM quad upper 16" w pinned Gas Block Surefire mount Microbest BCG. I have about 200 rounds through this upper. It runs great and I have had zero failures. I will include the Vortex Spitfire AR Prism Scope and a BCG but not...Big fan of BCM, I've got several of their uppers, going back to when Paul would answer the phone himself. Purchased a blem lower (when they switched locations) from them years ago. When I picked it up, I compared the hammer markings to a LPK on the shelf. Markings were identical to the DPMS LPK on the shelf. I figured they used the same supplier.BCM Lower Group w/MK2RMS-M1T0 & BCMGUNFIGHTER Stock Mod-0-SOPMOD (Wide-body) - Flat Dark Earth - Utilizes the BCM MK2 Receiver Extension, MK2 buffer, and rifle M16 action spring. The MK2 receiver extension is approximately 3/4'' longer than the standard 6 position extension.Instagram:https://instagram. 200 braehill The U.S. patents pending BCM Mod 3 Charging Handle now features upper and lower and side exhaust channels to vent gas from the chamber away from the shooter during operation of the weapon. While these channels are optimized for the BCM MK2 Upper receiver, they still provide improved gas diversion on all Mil-Spec upper receivers. LIFESAVING TOOLSBCM M4 Upper Receiver. BCM M4 upper receivers are machined to Mil-Specs from 7075 T6 forgings and equipped with our forward assist assembly and ejection port cover assembly, allowing the end user to upgrade or rebuild their individual components with other Mil-Spec parts in the future.. BCM MK2 Upper Receiver. The BCM MK2 Upper Receiver … mc clubs in pa Featuring BCM's Patent Pending MK2 Upper Receiver. This proprietary design offers enhanced rigidity over the USGI product. The increased rigidity limits barrel deflection which aids in consistency/accuracy. Less flex also reduces premature damage, wear, and failure of bolt lugs from misalignment. A gas expansion chamber is machined above the ...This kit contains all the necessary parts to mount your Mil-Spec dimension stock assembly to your Mil-Spec lower receiver. MK2 Mod 1 - T0 Buffer (weight = approximately 3.8oz) Mil-Spec M16A4 rifle action spring. Mk2 Receiver Extension (approximately 3/4" longer than carbine), 7076T6, 8 position, Mil-Spec diameter. Lock Nut (Castle) M4. costco santan The BCM RECCE-16 MK2 AR-15 is everything an AR rifle should be. As a defensive carbine the Bravo MK2 shines. Light, handy, compact and tack-driving accurate, all this with soft recoil and a really nice trigger. A hard combo to beat. (Firearms News photo) October 12, 2023 By Patrick Sweeney. Affiliate Disclosure: This page contains affiliate ...BCM US Patent #10415907 . This kit contains all the necessary parts to mount to your Mil-Spec dimension stock assembly to your Mil-Spec lower receiver. MK2 Mod 1 - T2 Buffer (weight = approximately 5.6oz) Mil-Spec M16A4 rifle action spring; Mk2 Receiver Extension (approximately 3/4" longer than carbine), 7076T6, 8 position, Mil-Spec diameter walther p22 aftermarket upgrades The U.S. patents pending BCM Mod 3 Charging Handle now features upper and lower and side exhaust channels to vent gas from the chamber away from the shooter during operation of the weapon. While these channels are optimized for the BCM MK2 Upper receiver, they still provide improved gas diversion on all Mil-Spec upper receivers.I would go BCM MK2 or PWS MK1. Even though I have beef with John Sharps right now, take a look at Sharps Bros SBUR03. The bolt catch cut may be just perfect for the ADM's catch and the front of the upper is flush with SLR rails for a seamless upper/rail transition. ... Hell the only reason I went to ADM lower was simply due to the bolt hold ... how to get coloured haki in blox fruits BCM® MK2 Standard 16" Mid Length (ENHANCED Light Weight) Complete Upper Receiver Group w/ MCMR-15 Handguard BCM. MSRP: $1,000.95 Your Price: $772.39 (You save $228.56 ) (8 reviews) SKU: BCM-MK2-URG-MID-16-ELW-MCMR-15 ... Bought this upper for my first AR-15 to attach to a PSA lower. I've only heard amazing things about BCM, and this did not ... target 7845 n macarthur blvd irving tx 75063 Building out my first AR15. I just purchased the BCM mk2 14.5 upper and I’m looking for suggestions for a nice lower to pair with it. I was considering the radian Adac. Probably going with a stripped lower and will add the Geissele LPK when I put together. What other suggestions do you have? Any suggestions here would be appreciated.It’s time to finish those lower receiver builds. (Photo: BCM) Internally the BCM MK2 uses standard and MIL-SPEC compatible bolt carrier groups and the upper works with all standard AR-15 lower receivers. Like BCM’s M4 or MK1 receiver, it features all 7075-T6 alloy construction with a hardcoat anodized finish and laser-engraved T-marks. michael tseng plate topper Upgrade your next build with the full-ambi MK2 lower receiver for a superior rifle foundation. Lower Receiver Manual ... aside, I really like the trigger guard, specifically the straight portion to the rear, as it allows the shelf on the BCM pistol grip I'd decided on using. One thing I'd like to see is the use of pictograms instead ...Or get a Rainier Arms lower, then add BCM LPK and ambi parts. PWS has their Mod 1 Mk2, which I can get for close to the same price as the BCM + upgraded parts. Both would also be upgraded to BCM A5 with A5H2 buffer, and Sprinco green rifle spring, so that is a wash. The only appeal of the PWS, I guess, is the ambi controls are built into. joann thousand oaks These lowers feature the new MK2 Recoil Mitigation System. Buffer made of 7075T6 aluminum, hard coat anodized for lasting endurance. Comprised of Mil-Spec components. SPECS: Machined from Aluminum Forgings 7075-T6. Hardcoat Anodizing: MIL-A-8625F, Type III, Class 2. BCM® MK2 Recoil Mitigation System. rafi cordova hoboken BCM Mk2 Recoil Mitigation System with T-0 Buffer (3.8 Oz) Low Shelf for RDIAS installation; Low Shelf for Accuwedge use; BCM Polished Nickel Teflon Trigger; BCM QD Sling Mount End Plate; BCM Pistol Grip Mod 3; BCM Enhanced Trigger Guard; Made in USA *FFL REQUIRED BEFORE SHIPPING gillette wyoming gun show Massachusetts residents, like those in most other states, have the option of buying cars at auctions. At an auction, there's a chance that you can get a much nicer car for a much c...BFH. Handguard: MCMR-15. Barrel Profile: Enhanced Light-Weight. BCM® Bolt Carrier Group: None BCM® Bolt Carrier Group (MPI) (Auto) (included FREE w/ Upper Receiver Group, Special Limited Time Offer) BCM® Charging Handle: None Ambi MK2 Handle (LARGE) +$89.95 Ambi MK2 Handle (MEDIUM) +$89.95 Asym MK2 Handle (LARGE) +$74.95 Asym MK2 Handle ... bus from madison wi to chicago o'hare The BCM MK2 Receiver Extension for your AR15, M16, M4. Machined from 7075T6 and manufactured to Mil-Spec dimensions and specifications. Mil-Spec receiver extensions have a slightly smaller dimension where the stock slides on. Hard Coat Anodized per Mil-A-8625F, Type III, Class 2. These tubes should be used with stocks such as USGI ...The BCM MK2 complete upper features a BFH hammer forged 16" barrel, chrome lined bore and chamber, T-marked upper receiver, MCMR 15" M-LOK handguard and black finish. Includes a FREE BCM Bolt Carrier Group! ($189.00 value). Limited Time Only, While Supplies Last.