Bcm lower mk2.

14.5in. Barrel Style: BFH. Handguard: MCMR-13. 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 …

Bcm lower mk2. Things To Know About Bcm lower mk2.

BCM® MK2 Standard 16" 300 BLACKOUT Complete Upper Receiver Group w/ MCMR-15 Handguard. MSRP: $1,116.50. Your Price: $861.49.5 days ago · Compatible with BCM MK2 Buffer and Rifle action springs For AR-15/M16/M4 lower receivers Bravo Company Manufacturing, initially a garage start-up company in Hartland, Wisconsin, nineteen years ago, has evolved into a premier company providing lifesaving tools and weapon systems. BCM® MK2 Upper Receiver Groups; Cosmetic Blem Upper Groups; 20" Rifle Upper Group; 18" SPR Mk 12 Upper Half; 18" Rifle Upper Group; ... Of ciurse it should be I have 5 bcm's. Love it got a complete lower. Retired LE and current FFl dealer and this is the rifle I recomend to all my customers. 5 Top Quality.The BCM MK2 Mod1 T4 AR15 buffer (7.4oz) is built for the BCM MK2 receiver extension to reduce felt recoil and provide consistent carrier velocity. ... AR-15 Lower Parts. Gunfighting Links American Gunfighter Films Gunfighters. BCM MK2 Buffer Mod 1 - T4 BCM. MSRP: $81.00 Your Price: $72.95 (You save $8.05 ) (No reviews yet) SKU: BCM-BFMK2-M1-T4 ...The BCM MK2 Mod1 T1 AR15 buffer (4.7oz) is built for the BCM MK2 receiver extension to reduce felt recoil and provide consistent carrier velocity. ... AR-15 Lower Parts. Gunfighting Links American Gunfighter Films Gunfighters. BCM MK2 Buffer Mod 1 - T1 BCM. MSRP: $46.50 Your Price: $41.95 (You save $4.55 ) (No reviews yet) SKU: BCM-BFMK2-M1-T1 ...

Details. 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 ...BCM MK2 on LWRCI lower! Just threw my new BCM MK2 16" onto my LWRCI lower. Waiting on that CD legacy body for my surefire tape switch, BCM Kag hand-stop, and still deciding on bipod (this is some BS airsoft one I had just for the concept). ... the BCM MK2 forward assist has those grooves/channels cut into it, and I've always surmised that ...AR Lower Parts; BCM MK2 Buffer Mod 1 (A5 compatible) ... NOTE: BCM M2 buffer Mod1 is Vltor A5 compatible, and must be used with BCM's Mk2 RE (BCM part #BCM-MK2-RE), or A5 compatible RE (such as RE5F, Vltor's RE-A5, RE10/A5SR), milspec rifle length spring, or Sprinco's Green spring. It is not compatible with TDP spec RE and buffer spring.

If 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.

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 - 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 diameterCheck out the BRAVO COMPANY available Online at Brownells Today and many more Rifle Lower & Upper Parts Kits products are available in our Gun Parts Department. ... 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 ...BCM Cosmetically Blemished Complete Lower. $ 475.00 $ 395.00. or 4 interest-free payments of $98.75 with. ⓘ. Order by 2PM CST for Same Day Shipping*. Shipping As Low As $1.99. 100% Live Inventory, No Back Orders. Rated 5.00 out of 5 based on 1 customer rating. ( 1 customer review)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.

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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 Parts; AR15 Lower ...

The BCM MK2 Mod1 T1 AR15 buffer (4.7oz) is built for the BCM MK2 receiver extension to reduce felt recoil and provide consistent carrier velocity. ... AR-15 Lower Parts. Gunfighting Links American Gunfighter Films Gunfighters. BCM MK2 Buffer Mod 1 - T1 BCM. MSRP: $46.50 Your Price: $41.95 (You save $4.55 ) (No reviews yet) SKU: BCM-BFMK2-M1-T1 ... AR-15 Lower Parts. Refine by No filters applied Browse by Brand ... BCM. BCM MK2 Recoil Mitigation System - Mod 1 - T2. MSRP: $138.00 Your Price: $123.95. BCM MK2 11.5 (ELW) Upper Receiver Group MCMR 10 MLOK. Features. BCM MK2 UPPER RECEIVER. Redesigned by lessons learned in combat since 9/11, the BCM MK2 Upper Receiver is built with up to 30% more rigidity than the current Mil-Spec M4 upper receiver without sacrificing interoperability for a mere additional 1/3 ounce of weight.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. LIFE SAVING TOOLS.A widebody design, the BCMGUNFIGHTER™ Stock Mod-0 SOPMOD has a more pronounced cheekweld which can assist in accuracy and comfort and is available in your choice of Black or Flat Dark Earth. Machined from 7075-T6 aluminum forgings with a Mil-Spec hard coat anodized finish, the lower receiver is completed with the BCM® small parts that keep ...

The BCM MK2 Mod1 T1 AR15 buffer (4.7oz) is built for the BCM MK2 receiver extension to reduce felt recoil and provide consistent carrier velocity. ... AR-15 Lower Parts. Gunfighting Links American Gunfighter Films Gunfighters. BCM MK2 Buffer Mod 1 - T1 BCM. MSRP: $46.50 Your Price: $41.95 (You save $4.55 ) (No reviews yet) SKU: BCM-BFMK2-M1-T1 ...Additionally, the tolerances in general are "looser" that other lower receivers I have. My personal recommendation would be to get a complete BCM lower with their Mk2 recoil system if you can save up a bit more. Or, the best-fitting lower I have is a Centurion. Aero is usually OK, but haven't been perfect for me.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 ...MK2 MOD 1 buffer series is to ONLY be used on the AR15 receiver platform and it ONLY works in conjunction with the BCM MK2 Receiver Extension (BCM part #BCM-MK2-RE) and the Mil-Spec Rifle M16 Action Spring (BCM part # SPRING-RIFLE-M16-ACTION).The BCM MK2 Receiver Extension for AR-15 is machined from 7075-T6 aluminum for tough dependability. Compatible with USGI, BCM, Colt, LMT, SOPMOD, VLTOR, Stag Arms, Magpul CTR, and any other MIL-SPEC stock. ... For AR-15/M16/M4 lower receivers; Bravo Company Manufacturing, initially a garage start-up company in …16in. Barrel Style: Standard. Handguard: MCMR-15. Upper Receiver: MK2. 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 …

AR Stripped Lower Receivers AR Complete Lower Receivers Handguns Rifles California-Legal Rifles ... BCM BCM4 MK2 BFH ELW 14.5" ML URG w/ MCMR-13 Handguard, Black The new kit consists of a slightly longer receiver extension with 8 positions paired with a slightly longer spring to help reduce bolt bounce and felt recoil. The BCM MK2 Recoil Mitigation System Mod1 kit is available in 3 different buffer configurations (T0 – 3.8oz, T1 – 4.7oz, T2 – 56oz) with T3 – 6.5oz and T4 – 7.4oz buffers sold ...

The BCM AR-15 Complete Lower Receiver is forged and machined from 7075-T6 Aluminum. The receivers are Hardcoat Anodized per MIL-A-8625F, Type III, Class 2 specifications. Features a Staked M4 Lock Nut, …why the bcm mk2 is so good . related items: larue tactical lt-10 stripped lower - 7.62 nato - black larue tactical complete match grade upper - 12.5" 5.56 nato - black lmt 5.56 ar15 lower parts kit - light sons of liberty gun works m4-89 13.7 upper receiver no bcg or ch $350.00In an interview with Jessica Moser of MetLife, Barry Moltz learns that small businesses are more optimistic about their future now than in the Spring. A good reference for how comp... The Mk2 RMS smooths out buffer displacement with a BCM hard coat anodized 7075T6 aluminum buffer and the use of an M16A4 rifle spring in an rifle length buffer tube. In action, this consistency means more rounds on target faster than a system equipped with the legacy M4 option. DetailsNOTE: For a limited time, all BCM barreled uppers come with a free BCG.Expect nothing less than professional grade weaponry from BCM. This Bravo Company Manufacturing Barreled Upper Receiver is built around a cold hammer forged 41V50 chrome moly vanadium steel barrel. The cold hammer forging process produces the most accurate, longest lasting barrels available with a more consistent ...Description. Life Saving Tools. BCM® M4 Upper Receiver Assembly (w/ Laser T-Markings) Built to the correct Mil-Specs. (Inside Diameter for barrel extension slightly undersized for a tighter fit to the barrel and a more accurate rifle. Please use a heat gun or hair dryer to warm up threaded bore of receiver if barrel extension is too tight.)Need a CRM app development company in France? Read reviews & compare projects by leading CRM and sales enablement mobile app developers. Find a company today! Development Most Popu...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), autoJan 28, 2021 · So I know that you normally want at least .75” of gap between the handuguard, so my dilemma is. 1. Sell the entire mk2 upper and start over with a new upper/handguard. 2. Try to find a 12.5-13.1 hand guard that will work with my upper. Midwest supposedly will not fit.

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14" Black River Tactical barrel. BCM 13" MCMR. BCM Mk2 upper receiver. BCM KAG. Radian CH. BCM headspaced bolt/LMT Enhanced carrier. Sionics Gutless Lower. Radian single side safety. Geissele QMS trigger.

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.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-T6 ...BUILT TO EXCEED. Forged from 7075T6, the BCM MK2 Upper Receivers retain a form following grain structure which maximizes achievable strength, the MK2 Upper Receiver retains all USGI components in assembly and works with all USGI bolt carriers, charging handles and barrel assemblies. MADE IN AMERICA. All BCM components and …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...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 ...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 Redesigned by lessons learned in combat since 9/11, the BCM MK2 Upper Receiver is built with up to 30% more rigidity than the current Mil-Spec M4 upper receiver without sacrificing interoperability for a mere additional 1/3 ounce of weight. Meet the new war. Upper receivers with baked in carry-handles and iron sights have been relegated to history. That being said, as long as you aren't using a MARS lower, there's no downside to the MK2 upper. I think the biggest upside is potentially less gas-to-face if you're using a suppressor. Even if not, all else being equal, my next BCM upper purchase (pinned 14.5") will be with a MK2 upper. Mainly because of the repositioned forward assist. 3. Reply.Google recently announced that they will be giving every U.S. business up to 500 Google Career Certificate scholarships to upskill employees. Google recently announced that they wi...AR-15 Misc Lower Parts. Read More expand_more Read Less expand_less Sort By: Quick view Add to Cart. BCM *Cosmetic Blem* BCM® MK2 Receiver Extension ... BCM. BCM MK2 Recoil Mitigation System - Mod 1 - T2. MSRP: $138.00 Your Price: $123.95. Out Of Stock. Quick view Add to Cart. Carbine Buffer. $11.00.

They arrived in July 2020. Here are the details: The SL prefix is for "Stripped Lower.". This SL prefix series will only be sold as a stripped lower. This SL prefix series is not offered as a factory built BCM lower group or rifle. This SL prefix series does not say "BCM Rifle Company". This SL prefix series has a model number of SX4.The MK2 buffer also features an internal biasing spring, which ensures that the weights always sit towards the front face of the buffer, reducing noise and providing consistent carrier speed, aiding in more reliable chambering and extraction. The BCM MK2 is a semi-proprietary buffer system. It is not compatible with Mil-Spec Carbine buffers or ...BCM Lower with Gunfighter MOD-2 SOPMOD Stock. ... BCM RECCE-16 MK2 BFH ELW MCMR-15 MK2RMS SOPMOD 2. Your Price: $1,767.00 Out of Stock. BCM RECCE-16 MCMR-15 BFH GOVT ...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 *COSMETIC BLEM* BCM® MK2 Standard 14.5" Mid Length Complete Upper Receiver Group w/ MCMR-13 Handguard. MSRP: $884.39 Your Price: $661.39. In Stock.Instagram:https://instagram. combs butcher shoppe Colt 6920 is $900. BCM lower ($400) + Colt-like upper ($439) + BCM BCG ($170) + BCM handguard is $1035, for which you get mid-length gas system, enhanced single stage trigger, better stock, better grip, and better polymer handguard. With PSA complete lower instead of BCM, total cost would be $800. Colt Combat Unit Carbine is $1200.From PA/BCM's description: "The BCM MK2 Mod 1 - T0 recoil mitigation system is designed to lessen felt recoil without compromising reliability. To further enhance performance, this lower also features a Mil-Spec M16A4 rifle spring, featuring more spring coils, which increases consistency and reliability and widens the operating envelope.". daily wire shop discount code I have 3 BCM uppers, 2 BCM lowers and 1 Aero lower, on some pmags if I insert them empty the follower can slip infront of the bolt catch on the Aero lower, this happens with the Aero bolt catch and the slightly longer spec'd FCD bolt catch, FCD told me they have seen this and it is a common issue with Aero lowers. ...In Missouri, medical debt falls under the same classification as consumer debt. Missouri does not have its own debt collection law but Missouri residents are protected from unfair ... used rv sales in ocala fl SKU. LRG-STK-MOD--BLK. Product Type. AR-15 Complete Lower Receiver. Manufacturer. Bravo Company MFG (BCM) Option. AR-15. BCM Lower Receiver Groups feature Machined from Aluminum Forgings 7075-T6 Hardcoat Anodizing: MIL-A-8625F, Type III, Class 2 BCM Milspec 7075-T6 Receiver Extention BCM Gunfighter Stock Mod 0 Staked M4 Lock Nut USGI H Buffer ...When correctly installed and tuned, the patented* BCM MK2 RMS reduces felt recoil without affecting reliability. The Mk2 RMS smooths out buffer displacement with a BCM hard coat anodized 7075T6 aluminum buffer and the use of an M16A4 rifle spring in an rifle length buffer tube. In action, this consistency means more rounds on target faster than ... gulfstream race results for today AR Complete Lower Receivers Handguns Rifles California-Legal Rifles Shotguns NFA Items Other Used Firearms Gunsmith Services Parts. AR Upper Receivers AR Complete Upper Assemblies ... 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 ...This is the BCM MK2. Big thanks to Freedom Trading Co and Black dot for making this ... Today we check out the latest offering from Bravo Company Manufacturing. fat ugly feet The BCM MK2 Mod1 T1 AR15 buffer (4.7oz) is built for the BCM MK2 receiver extension to reduce felt recoil and provide consistent carrier velocity. ... AR-15 Lower Parts. Gunfighting Links American Gunfighter Films Gunfighters. BCM MK2 Buffer Mod 1 - T1 BCM. MSRP: $46.50 Your Price: $41.95 (You save $4.55 ) (No reviews yet) SKU: BCM-BFMK2-M1-T1 ...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! Features how to figure linear feet from square feet The Bravo Company MFG. Complete AR-15 Lower Receiver Assembly - Cosmetic BLEM is an ideal choice for any AR-15 build. Forged from lightweight and resilient 7075-T6 aluminum, this lower receiver ensures optimal strength-to-weight ratio, allowing for reliable performance in demanding conditions. Its type III class 2 hardcoat anodized black finish ...BCM® MK2 Upper Receiver Groups; Cosmetic Blem Upper Groups; 20" Rifle Upper Group; ... AR-15 Lower Parts . All AR-15 Lower Parts; AR15 Lower Parts Kits; Tactical Triggers; Trigger Guards; ... BCM. BCM® 20" SS410™ SAM-R Barrel with Rifle Length Gas (stripped) 1/8 Twist (Ionbond Black) mopaga In an interview with Jessica Moser of MetLife, Barry Moltz learns that small businesses are more optimistic about their future now than in the Spring. A good reference for how comp...The new kit consists of a slightly longer receiver extension with 8 positions paired with a slightly longer spring to help reduce bolt bounce and felt recoil. The BCM MK2 Recoil Mitigation System Mod1 kit is available in 3 different buffer configurations (T0 – 3.8oz, T1 – 4.7oz, T2 – 56oz) with T3 – 6.5oz and T4 – 7.4oz buffers sold ... argus leader sioux falls sd obits The BCM MK2 Receiver Extension is a 7-position receiver extension tube designed to work with the VLTOR A5 buffer system. This receiver extension is slightly longer than the traditional M4 receiver extension and is designed to work with Mil-Spec dimensioned M4/AR-15 type collapsible stocks. The BCM Intermediate Receiver Extension, designed for ...Product Details. Description. 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 MK2 lower is a premium rifle platform offering proper fitment and utility with mil-spec lower components. To enhance durability, the MK2 lower is hardcoat type 3 ... gas laws magic square AR-15 Misc Lower Parts. Read More expand_more Read Less expand_less Sort By: Quick view Add to Cart. BCM *Cosmetic Blem* BCM® MK2 Receiver Extension ... BCM. BCM MK2 Recoil Mitigation System - Mod 1 - T2. MSRP: $138.00 Your Price: $123.95. Out Of Stock. Quick view Add to Cart. Carbine Buffer. $11.00.Very pleased with my purchase and glad i was able to find a bcm lower. 5 Excellent every time. Posted by trey Kennedy on Sep 5th 2019 ... BCM. BCM® MK2 SS410 18" Rifle Complete Upper Receiver Group w/ MCMR-15 Handguard 1/8 Twist. MSRP: $1,067.99 Your Price: $855.99. Out Of Stock. address for internal revenue service fresno california Bud's Item #. 14529. UPC. 812526020642. Manufacturer. Bravo Company. 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 ...In 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... shade wisp deepwoken Daniel Defense AR-15s tend to be over-gassed to power through debris on non-suppressed AR-15s and are built to specifications that exceed the minimum mil-spec requirements. BCM also offers greater than mil-spec quality but comes in at a lower price point with more customization. The baseline for purchasing either tends to be aesthetics and price.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 ...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.