Bolt Carrier Group - 5.56/.223/300 BLK - Nitride - Left Handed

(11 reviews) Write a Review

This bolt carrier assembly is designed to work with any Stag 15 rifle, upper half, or barrel designed for left hand ejection in the either 5.56, .223, or 300 BLK. The salt path nitride process (also known as QPQ) creates a much harder surface that is, easy to clean, will run with less than ideal lubrication and resists wear for a lasting corrosion resistant durable finish.


Coating: Nitride Coating

Bolt carrier material: 8620 steel

Bolt: 5.56/.223/300 BLK Left-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: STAG310858


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 left-handed 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.

11 Reviews

  • 5

    Posted by John J Even on 16th Feb 2021

    Works perfectly with the Stag arms upper, I finally have a left-handed AR.

    Congrats, John!

  • 5
    Left-handed BCG

    Posted by Amir Genovese on 2nd Feb 2021

    This is my first left-handed rifle, and I'm brand new to the AR world, but have been shooting other stuff almost 40yrs for whatever that's worth.

    I had this assembled, combined with a STAG left-handed upper in Saturday, then on Sunday took it to the range with a friend and his son. Between us we put around 250rds of filthy Tula ammo through it without a hiccup. When I got home I was worried about how dirty everything would be, but thanks to the nitrided finish, it mostly wiped clean using a rag oily with Slip2000. Cleanup was a breeze.

    Very happy with my purchase so far, and have also started a STAG 10 LH build as well.

  • 5
    Left bcg

    Posted by Drew Kinmam on 28th Jan 2021

    Great quality bolt worth the money. Very fluid smooth working will order more other builds.

  • 5
    The Standard

    Posted by Matt on 13th Jan 2021

    Recently I purchased 2 more of these Nitride LH BCG, adding to my previous 4. While there are only a few options out there for the left handed user I have always gone back to the Stag Arms BCGs for their reliable durability in both my left & right handed builds.

    I have occasionally used random “shady no name” BCGs in the past when Stag BCGs were unavailable, but always seem to break the lesser quality BCGS of unknown origins. Until you personally experience those failures you won’t really appreciate the confidence that Stag parts provide.

    My Stag BCGs have continued to run flawlessly. My recent purchase of the 2 additional Nitride coated BCGs was a direct result of my experience with the one I had bought a while back. They are quick to clean and seem to run the rest of the course even when in desperate need of a brush and lube, even suppressed. This was not the case with the “shady no name brand” BCG. I own Stag brand in chrome phosphate, nitride, and the nickel boron LH & RH BCGs, with some of those being blems that still run as hard as I have asked them to. Even the Stag BCG with the US Flag laser engraved engraved on it holds its finish to this day and flys proudly in my 10.5”.

    Although a bit expensive and sometimes difficult to obtain, my purchases direct from the Stag website are worth the wait and quite frankly the price since most other sites carrying them are gouging something fierce. Looking to add an additional 2 nickel boron LH BCGs to the collection next time they are available.

    Thank you for your continued business!

  • 5
    A High Quality LH BCG?? YES!!!

    Posted by Larry on 5th Jan 2021

    Ordered two of these, and they're everything that STAG says they are. Echoing previous reviews, both of these have, not only a perfectly finished surface, but are perfectly machined to high quality standards. It's not easy finding LH high quality parts for an AR, especially in these days. As a lefty, I personally want to thank STAG ARMS for doing so and looking out for us lefties....great job.

  • 5
    LH Black Nitride .223 BCG

    Posted by Will on 3rd Dec 2020

    I'll getting more of these for my upcoming 6.5 Grendel build... slickest finish I've see on a BCG. Works great in my 5.56/.223 build.
    Appreciate the fast service during these times as well.

  • 5
    Lefthanded AR is great

    Posted by Jerry on 19th Oct 2020

    STAG MAKES GREAT PRODUCTS AND the LH bolt carrier worked great with my fist LH AR. Going to work on an AR 10 next

  • 5

    Posted by Richard Napierala on 9th Oct 2020

    Perfect fit and function as always from Stag Arms. Highly recommend for all us south paws. Thanks.

  • 5
    Nitride BCG - Left handed

    Posted by HN on 9th Oct 2020

    A great upgrade. Has functioned flawlessly using bulk ammo (no jams or malfunctions) and cleaning is noticeably easier and faster.