AR-15 Mil-Spec BCG

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M16 Profile Carpenter 158 Mag Phosphated 5.56 NATO MPI Full-Auto Bolt Carrier Group

In stock

Special Price $ 69.99

Regular Price: $ 99.99

Quick Overview

WARNING: This product can expose you to the chemical lead, which is known to the State of California to cause cancer and reproductive harm. For more information go to (CA Health and Safety Code Section 25249.6).

SKU: 5165458947
UPC: 5165458947

M16 Profile Carrier

Milspec Carpenter 158 Steel Bolt

Magnetic Particle Inspected (MPI) bolt

Chrome Lined Carrier (Full Auto Profile)

Chrome Lined Gas Key

Gas Key Hardened to USGI Specs

Gas Key Grade 8 Hardened Fasteners

Gas Key Staked 


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For AR-15 and M16 rifles and carbines.  Made by one of the large popular OEM BCG makers who is also a military supplier.  These BCGs are available due to a large OEM order being canceled.  We purchased them all and are making them available to you at an incredible price. Their loss is your gain! 

These feature a Carpenter 158 Bolt, and a full profile chrome lined carrier.  Bolt is made of shot-peened, Mil-spec Carpenter 158® steel. Gas key is secured with grade 8 fasteners and staked. The bolt carrier is parkerized outside and chrome lined inside.

SKU: 5165458947
SKU 5165458947
Department Manufacturing Parts
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Unit Price No
Youtube Video No
Free Shipping? No
Free Shipping Qty Label Yes
Free Shipping Qty 2+
SKU: 5165458947

Questions and Answers

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Browse 13 questions Browse 13 questions and 49 answers
Is this manufactured by BCM?
Michael S on Jun 26, 2019
BEST ANSWER: BCM doesn't manufacture BCG's, they subcontract them. The big premium you pay is for the specs and the logo.
They might be made AO Precision. Another company was selling one very similar, I'll update when I get mine and compare.
Does this have a o ring on the ejector ?
Daniel M on Jun 26, 2019
BEST ANSWER: On the extractor. Yes it does.
Does this bolt have a tool steel extractor?
Donald S on Jul 1, 2019
BEST ANSWER: Just Carp 158, through and through. But, can't be definite on that.
does this mean with this you can make the ar15 full auto ?
casey o on Jun 26, 2019
BEST ANSWER: it means that if you have a modified fire control, sanctioned by the powers that be of course, that allows for full auto then this bcg has potentioal to accomodate that, you need to have full auto fcu stowed away first. Good luck and hope this helped
Can I use this to replace the semi-auto BCG on my AR15 so that I can add a binary trigger to the weapon?
Clifford T on Jun 27, 2019
BEST ANSWER: Like adding a fostech? Yes
Will it function in a semi auto 300 blackout?
Randy on Jun 27, 2019
Are these MPI marked? Thanks!
IceColdBeer on Jun 27, 2019
BEST ANSWER: No they are not. They are MP Inspected though.
has anyone had a headspace problem with these?
oilcan dan on Jul 6, 2019
BEST ANSWER: Pass'd the GO and NO GO. But that's more based on your barrel not on the BOLT carrier.
Is it ready to go out of the box?
Jaygarza on Oct 20, 2019
BEST ANSWER: You may need to clean some of the grease off of it and re clean it they last two I have ordered had a lot of packing grease because they tend to sit on the shelf for a while before shipping out.
Would the BC work in a semi auto? No plans to convert to full auto..
James K on Jul 1, 2019
BEST ANSWER: Yes it will!
Is the extractor 158 as well?
Christopher B on Jul 9, 2019
BEST ANSWER: Don't quote me on it, but I believe the whole Bolt is.
Is this bolt carrier complete? Does it come with a firing pin?
Chuck R on Jul 2, 2019
BEST ANSWER: Yes, it is complete.
Are the carrier's also made of 158 or are they 8620?
Chris Z on Jun 26, 2019
BEST ANSWER: 8620 for the carrier.


4.8 / 5.0
93 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great deal...GREAT price!
October 17, 2019
3 months ago
Great bcg for great price
I have a couple of these bcg's and they run better than any other cheap ones I've bought and just as good as the high end bcg's if u need a bcg then I wouldn't hesitate go ahead and buy thus one
October 13, 2019
1 month ago
Great BCG for the money.
Looked over the lugs to be sure there were no irregularities. Checked the rings for a nice snug fit. Checked the gas key for proper staking. So far, functions like a dream. Time will tell.
October 9, 2019
3 months ago
Works great looks great fine bolt fit great
September 23, 2019
3 months ago
Get it.
Best bolt for the price!
September 22, 2019
3 months ago
well worth the money.
came well packaged, smooth phosphate carrier, chrome lined gas key properly staked and bolt correctly marked. viton o-ring was a plus.
September 9, 2019
3 months ago
It is a spare so I have not used it yet. It looks good and the price was right.
September 8, 2019
3 months ago
Solid quality and reliable BCG at a good price point, does not disappoint! I enjoy PSA products, have for many years.
September 8, 2019
3 months ago
Good product, i caught it on a sale.
A good price and a nice mil spec bolt carrier. I haven't test fired it yet but have no reason to doubt it will function.
September 7, 2019
3 months ago
Great piece!
Well made, great machining, very nice finish, bought another one!
September 5, 2019
3 months ago

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