CMC Triggers Enhanced Nitrided AR-15 BCG - 5.56

Manufactured by CMC Triggers
SKU: 81631
MPN: 81631
Manufactured by CMC Triggers
7 Reviews
$179.10

In Stock

Non-FFL orders placed before 3:30pm CST will ship same business day. Non-FFL orders placed after 3:30pm CST will be shipped the next business day. FFL orders will ship within 3 business days once transfer details are provided.

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Details

Details

The CMC Triggers Enhanced AR-15 Bolt Carrier Group has been expertly designed to increase the life and reliability of your AR rifle. It features a new geometry that reduces the amount of friction points against the upper receiver reducing wear and making the action feel smoother. It is also finish in a salt bath Nitride finish which further increases lubricity and hardness, so you can go longer between cleaning. However, it still has Mil-Spec dimensions for compatibility in all AR-15 upper receivers. It features an M16 cut with a flared end that increases weight for use with SBRs or suppressed rifles while also decreasing the amount of carrier tilt. Every surface is CNC ground after the heat-treating process to ensure precise dimensions with the highest possible tolerances. The carrier is machined from 8620 steel while the bolt is machined from 9310. The bolt is shot peened to increase strength and then high pressure tested to ensure a long service life. If you plan on running suppressed or simply want to build a bomb-proof rifle, the CMC Enhanced AR-15 BCG is the way to go.

Features:
  • Black Nitride finish
  • Enlarged forward ports
  • Optimized for suppressor use
  • Hardened 4340 cam pin
  • Mil-Spec 8740 steel firing pin
  • MPI and HPT tested
  • Mil-Spec Extractor Spring & O-Ring
  • .223/5.56/300BLK compatible

With roots in aerospace manufacturing, CMC is perhaps best known as the producer of the original drop-in precision trigger for the AR-15/10 platform. CMC Triggers are dedicated to crafting the finest parts and accessories for law enforcement, military, and civilian use.
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Specifications

Bolt FinishSalt Bath Nitride
Bolt Material9310 Steel
BrandCMC Triggers
Caliber Gauge5.56 NATO
Carrier FinishSalt Bath Nitride
Carrier Material8620 Carpenter Steel
Carrier StyleM16 Bolt Carrier
High Pressure TestedYes
Magnetic Particle InspectYes
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

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Ratings & Reviews

7 reviews

4.3
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Less gas and smoother recoil

by -

This in conjunction with a geissele super or airborne charging handle and any A5 style buffer system gives you smooth recoil impulse and it seems to vent has a lot better. The upper was a factory daniel defense with a surefire 300 sps and a warcomp. That can is known to be more back pressure but also that upper is known to be gassy. When I shot it with a standard BCG and no can it was more punchy than with the cmc and no can. I think the cmc BCG is a great option if you get it on sale for any build suppressed or not.

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Softer recoil and less gas

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I’ve used this BCG and it seems to have a softer recoil impulse than a normal BCG, I’m not sure if it’s the reduced friction and less bolt tilt but to me it’s a softer impulse. I threw it in a mk18 with a geissele charging handle, warcomp, and a 300 sps and it had less gas to the face than my work urgi with a rc2 and normal BCG.

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Works great

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Works great and the finish/treatment is easy to clean. My rifle is suppressed so it gets filthy and this enables me to wipe it off and keep going. Haven’t noticed anything special with it but I have noticed that with the addition of the Radian SD charging handle it takes 30-40 rounds before my eyes start burning compared to 15-20 in the past. I like it. Well machined and finished.

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Super bummed!

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So I tried something new. I went whole hog and tried it twice.

The least expensive enhanced bcg for suppressed rifles. I got the 556 and 6.5 Grendel. Actually, made a big difference. About 300% more gas out of the ejection port.

So now I see the whole picture. I wasn't getting much "gas to the face" because of my rtv and drilled charging handle with my standard bcg. Maybe even none. All my gas was from the ejection port area. Then, with this new bcg I was getting 300% more gas out of the ejection port.

Problem is, I mostly shoot I doors with no wind. Even 3 mph gets the job done. Unless it is spooky calm, you always have 3 to 5 mph wind. Add to this my brass catcher. It reduces the velocity of the escaping gas to 0. So with the new bcg I get 3x more gas enveloping my head area.

Yes, I shot both new bcg's, then both old bcg's back to back.
Money spent, experiment performed, data collected, and analyzed. Conclusion: don't use suppressor enhanced bcg indoors.
You're welcome.

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Good quality BCG

by -

Just like it's San Tan version, good quality BCG.

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10/10 bcg

by -

Looks and works great, 10/10 reccomend

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Great bcg

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Excellent finish and quality

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