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CMC Triggers Enhanced AR Bolt Carrier Group (BCG) Up to 10% Off w/ Free Shipping — 2 models
The CMC Triggers Enhanced AR Bolt Carrier Group will function as intended suppressed, or un-suppressed. Although it has been specifically optimized for use with a suppressor.
The CMC Triggers Enhanced AR Bolt Carrier Group will work great for your setup as it was designed to have fewer points of contact, resulting in less friction area. The increase in mass ensures proper gas pressure and increases dwell time, thus improving extraction while shooting suppressed or short-barreled rifles (SBRs).
received my BCG and like another reviewer mentioned, it is labeled ST , not CMC . ST stands for San Tac , a daughter company of CMC. they ran out of the CMC labeled BCG's as per their rep who i called to make sure what i got was what im supposed...
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Seems to be a solid piece of kit. I have not tested it as my build is incomplete. However, the ejector is very strong and the BCG slides very smoothly in the upper even with no oil. Some edges are rather sharp. Not sure they would cut the BCG feels l...
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Quality manufacturing from CMC. Well-designed with the perfect shape and weight balance for the AR. Also, the black nitride coating holds up well. Haven't tried it with a suppressor yet, but supposedly it's "optimized for suppressor use". Worth th...
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These BCGs are extremely high quality. Even for the price, know that what you're buying is an enhanced carrier with some added features over other carriers. The only downside I'd say is that it's not the slickest finish out of the box, like say a NiB...
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I bought these to utilize on my AR15’s to reduce blowback when using my suppressors! These work just as designed, and I would highly recommend! Shipping was super fast, even just before Christmas!
Product Info for CMC Triggers Enhanced AR Bolt Carrier Group (BCG)
The CMC Triggers Enhanced Bolt Carrier Group BCG is designed for shooters who demand superior performance weapon components in the heart of their firearm. CMC Triggers manufactures the highest quality firearms components in the industry.
Carrier Assembly: The flared rear of the enhanced bolt carrier is designed to reduce carrier tilt/cant during recoil and increasing reliability by strategically relocating key bearing surfaces.
The CMC enhanced carrier has fewer points of contact resulting in less friction area and the increase in mass ensures proper gas pressures and increases dwell time, thus improving extraction while shooting suppressed or short-barreled rifles (SBRs)
Case-hardened 8620 steel (complete care is taken during the heat treat process, so as to not harm the metal)
3 forward ports, enlarged to allow over pressure to escape
Optimized for suppressor use
Black Nitride Finish
4130 Steel, attached with Grade 8 hardware, torqued and properly staked into a milled valley around a fully encased ejection port area, for added strength and rigidity.
Hardened 4340 cam pin.
Mil Spec firing pin made of 8740 steel, center-less ground and Hard Chrome coated.
Bolt Assembly: The Bolt is true Mil Spec dimension and external surfaces are CNC ground after heat treat for a precision fit. These bolts are held to the highest possible tolerance possible. The trumpet area behind the gas rings, where carbon normally collects, is precision CNC Ground after heat treatment, to ensure as smooth of an area as possible, easing clean up, and longevity.
9310 Case Hardened Steel
All Bolt components Shot Peened & Black Nitride coated
4340 Steel, Manganese Phosphate coated
Magnetic Particle Inspected (MPI) and High Pressure Tested (HPT)
Black Nitride low friction coating
Mil Spec Extractor Spring & O-Ring
BLACK NITRIDE is a process commonly referred to anonymously with SBN (Salt bath nitride) and sometimes QPQ (quench polish quench). All of these are a form of nitrocarburizing which is a chemical hardening of steel in short.
Black Nitride Finish Benefits:
Increased wear resistance
Improved fatigue strength
Better corrosion resistance
Withstand corrosion per ASTM spec B117
Improved lubricity
Enhanced cosmetic appeal
Better corrosion protection at equivalent or lower costs than hard chrome nickel plating
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