This M16 Bolt Carrier Group drops right into your M16, AR15 or M4 platform rifle. We source our components from manufacturers that meet or exceed Military Specifications. All parts are machined and properly heat treated to Mil-Spec followed by complete Nickel Boron coating with UCT’s Exclusive EXO Technology.

Our Nickel Boron Bolt Carrier Group is specifically coated to allow your rifle to operate smoothly, be easily maintained, and work longer without being cleaned. We offer a 100% money back guarantee. With top quality companies that we utilize to plate our BCG’s such as the UCT EXO Nickel Boron bolt carrier group, and WMD bolt carrier group, we are confident that each component that the BCG is made of will successfully work on any quality AR15 rifle. Every component, from the extractor to the firing pin, is made with exacting specifications to meet military standards and provide the best control possible. The 9310MPI BCG is engineered to fit and work with the AR15, M4, and also as a M16 BCG.

Order from our site today and experience the quality products we have to offer at great prices. If you are not satisfied, take advantage of our 100% money back guarantee.


Coated Inside & Out With UCT EXO NiB
Enhanced 9310 Steel (Bolt)
8620 Tool Steel (Carrier)
Mil-Spec Extractor Spring, black extractor insert, Viton O-Ring
Tool Steel Extractor
Shrouded Firing Pin
Mil-Spec Gas Key (4130 Steel) attached with Grade 8 hardware and Properly staked
Bolt is shot Peened and MPI
Carrier is polished before plating for increased lubricity
100% Money Back Guarantee
Lifetime Warranty

Product Code: NIBBCG-9310

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Comments (6)

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Nickel boron is for nickel moron's

0 votes
2 votes

I’ve put 27,000 rounds through mine and never cleaned it, my hair is growing back and I’m dating a supermodel. Thanks RTB!

5 votes
1 vote

Seems to be a good value during The ‘Rona. I’d personally pass, as I prefer C158 bolts.

1 vote
1 vote

Based on what? Besides dickheads on the internet I mean.

1 vote
1 vote

Not sure what you mean. Pretty open-ended sentence that mean a lot of different things. Could you please clarify?

1 vote
0 votes

I have 2 NiB BCGs and 1 hard chrome BCG.

They are all awesome for cleaning. They are worth the extra money for that alone.

2 votes
0 votes
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