Bolt Carrier Group - 5.56/.223/300 BLK - Nickel Boron - Right Handed

(30 reviews) Write a Review

This bolt carrier assembly is designed to work with any AR-15 rifle, upper half, or barrel designed for right hand ejection in the 5.56/.223 caliber. The nickel boron coating has increased lubricity and a low friction co-efficient; therefore, the life expectancy of a firearm will be greatly increased due to reduced friction wear.


Coating: Extremely Durable Nickel Boron Coating

Bolt carrier material: 8620 steel

Bolt: 5.56/.223 Right-Handed Bolt assembly

Included parts: Bolt carrier, bolt assembly, cam pin, firing pin, and firing pin retaining pin

Design: M16 carrier with a shrouded firing pin

Staking: Proper mil-spec staking of the gas key

SKU: STAG300755


Q: Will this bolt carrier work with other manufacturer's rifles and upper halves?

A: Yes, this bolt carrier assembly will work with other manufacturer’s 5.56 rifles and upper halves.

Q: Can I use this bolt carrier with the Stag Arms piston system?

A: No, this bolt carrier assembly will not work with piston systems.

30 Reviews

  • 5
    Excellent BCG

    Posted by Jim Hauenstein on 9th Jan 2021

    The Stag Arms nickel-boron BCG I receiced was well constructed and totally devoid of any tool marks. The gas key was well staked and all the other components looked great as well. The outer surface was very smooth and moved effortlessly inside of my upper receiver. I haven't finished my AR build yet, but I did test the action with some dummy rounds and BCG fed and ejected them very well.

  • 5
    Quality BCG

    Posted by Darrell on 5th Jan 2021

    One word!! Incredible!!

  • 5

    Posted by Alan Schmitt on 25th Dec 2020

    Easy to clean and smooth as silk, it performs flawlessly.

  • 5
    Favorite BCG

    Posted by Bobby on 25th Oct 2020

    Best BCG I own, runs slick even with low or no oil, completely reliable

  • 5
    Nickle Boron BCG

    Posted by Jess on 24th Aug 2020

    I purchased the Nickel Boron Bolt-Carrier Group as an upgrade to my standard OEM BCG. I couldn't be happier with the craftsmanship and quality of this product. I love STAG!

  • 5
    Nickle Boron Bolt

    Posted by Timothy S. on 15th Sep 2018

    Bought one a while back, slick as owl sh-t on a greasy corn cob, works like it should. I believe it can't be beat.

    Thanks Stag keep up the great work.

  • 5

    Posted by Ethan on 5th May 2018

    Probably one of the best mid-range BCG's you can get. Mine came with my Stag 6 upper and has had about 5000-6000 rounds through it and has yet to show any signs of wear or damage (including the Bolt, gas key, firing pin, etc.

  • 5
    Nickel/ Boron BCG

    Posted by Franklin on 1st May 2018

    Stag had a one day only sale, on this BCG, and it was half price at $84.00 . I have their base Model 1 AR-15 I bought from them in 2014, so why not (at this price) treat myself to an upgrade. Fits like it should, runs like it should and is much easier to clean than a standard BCG. Well worth the FULL price. Very pleased. My rifle, with this upgrade, is everything I need and Stag has my back the entire way.

  • 5
    Beautiful bolt assembly!

    Posted by Nemo on 26th Mar 2018

    This assembly is beautiful! It functions flawlessly and is easy to clean. No malfunctions at all and fits my new Stag upper perfectly. Extremely smooth action that puts all the shell casings into a nice pile on the ground. I'll have to get more of these during the next sale.