PSA 5.56 Nitride MPI Full-Auto Bolt Carrier Group

More Views

PSA 5.56 Nitride MPI Full-Auto Bolt Carrier Group - 516446953

In stock

Special Price $ 54.99

Regular Price: $ 89.99

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: 516446953
UPC: 516446953
MFR#: 516446953


Bolt Finish: Nitride
Bolt Steel: 9310
Profile: Full Auto Profile
Gas Key: Grade 8 Hardened Fasteners, Staked per MilSpec

Bolt is Magnetic Particle Inspected (MPI)

**Due to part constraints, some orders may receive a free upgrade to a Mil-Spec Carpenter 158 Bolt**

Add To:

8620 Full-auto profile bolt carrier group with 9310 steel bolt. Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked Per Mil-Spec. 

SKU: 516446953
SKU 516446953
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 No
Free Shipping Qty No
SKU: 516446953

Questions and Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 72 questions Browse 72 questions and 246 answers
Is the carrier nitrided, or phosphated?
Robb R on Jan 4, 2019
BEST ANSWER: It says "nitride" right in the product name and in the description!
Is this and it's components made in the US?
Todd H on Jan 5, 2019
BEST ANSWER: American made, for life!
What exactly constitutes this as a "full auto BCG" ?
Matt H on Jan 5, 2019
BEST ANSWER: FA bolt carries have less of the underside milled out. This leaves a “lip”, or portion, of the bolt carrier that trips the auto sear when the bolt goes make into battery. When the auto sear is trip, the hammer is released. Semi auto bolt carriers have the portion of the carrier milled out. Semi auto rifles also don’t have auto sears though, so putting this into a semi auto rifle does not make it a machine gun and is perfectly legal.
Are these actually made by PSA?
Mohan N on Jan 4, 2019
Is the inside of the bolt carrier chrome plated?
Sidney S on Jan 7, 2019
Some of the photos show a C158 marked bolt. Is this accurate in currently shipping product?
Stephen C on Feb 19, 2019
BEST ANSWER: I have two and both came with C-158 bolts
Is this logo or no logo?
Mason R on Jan 4, 2019
BEST ANSWER: no logo
hi your i need of just a extra m4 bcg and im told that the full auto group will work fine my question is,, is the full auto group allowed to be owned in ohio some states will not allow you to own any part of a full auto weapon could you help me out on this question?
v h on Jan 5, 2019
BEST ANSWER: Perfectly legal to own in all 50 states.
Totally complete with the Firing pin ????
Armando on Jan 3, 2019
BEST ANSWER: Yes, hence Bolt carrier Group, not just bolt carrier
Are these machined from a billet?
Michael H on Jan 4, 2019
There are no cast bolts or bolt carriers
Are these Toolcraft BCGs or actually made by PSA?
Kiel on Feb 28, 2019
BEST ANSWER: Who knows? Some mysteries are better left unsolved. The PSA is identical in all respects to my Toolcraft BCG's so... sure!
16 stuff legal in 15s?
Paul M W on Feb 26, 2019
BEST ANSWER: Only in some parts of Mexico. Here you have to wait until they are 18 unless you are purchasing an Islamic child bride.
Will this work for semi automatic?
Jay K on Jan 5, 2019
BEST ANSWER: Yes, and would work on an M16 also
I once had a gunsmith tell me never to put a full-auto bolt into an AR15, that it was illegal to do so. Have I been snookered by this guy for the past 20 years?
David R on Jan 23, 2019
BEST ANSWER: Yes they are not illegal they don’t make your gun full auto it’s just the cutout profile that makes it the full auto profile you need many other parts to let em buck
Can this item be shipped to California?
Drew M on Jan 19, 2019
Will this work in 300BLK also?
D Ray on Feb 14, 2019
BEST ANSWER: Yes, the 5.56 and the .300 have the size rim. The blackout is made from the parent 5.56.
Ok soI have a M16 BCG Can I put this I’m my Del Ton and not have to change and this like buffet spring or my buffer?
Eddy B on Apr 30, 2019
BEST ANSWER: As far as I know M-16 bolt carrier groups will fit in ALL AR-15 upper recievers without any modifications or special buffers or springs. I have 3 ARs - 2 that I built with Spike's Tactical parts & 1 with Palmetto State Armory parts - all have an M-16 bcg. All function flawlessly. Delton is a higher priced rifle, but that should guarantee it to function without a hitch. If not, I'd get a different rifle. Just saying...
Does this bcg shoot .223 5.56 and .300 blackout?
Henry P on Feb 26, 2019
Can I run this BCG in a semi-auto AR? or does it have to be a fully auto?
Al L on Feb 11, 2019
BEST ANSWER: The Full-Auto BCG works equally well in the AR-15 semi-auto, or M-16 full-auto weapons. I prefer the full-auto BCG for any AR series rifle I build or own. Hope that helps!
building a 300 blackout can this bcg be used ?
Jeffrey W on Feb 8, 2019
BEST ANSWER: Yes I use one of these in my 5.56 and my .300 Blackout also.
Do these come complete with extractor, ejector parts and firing pin?
Darel D on Jan 23, 2019
Is the Bcg have O ring?
Gerry on Jan 21, 2019
BEST ANSWER: Yes, has O ring on extractor spring.
Will it shoot .223 and .300 blackout. Can I use it with an ar15 pistol?
Henry P on Jan 10, 2019
BEST ANSWER: Yes, this is able to be used for both .223 and .300 blackout. .223 and .300 blackout use the same casing. This will work in a pistol.
Can this 5.56/.223 BCG be used in a .300 Blackout upper?
Kenneth D on Jan 5, 2019
BEST ANSWER: Yes it can. The 300 Blackout has the same cartridge head as a 223/5.56.
Does the bolt have the little "donut" for the extractor?
Steven J on Mar 23, 2019
BEST ANSWER: mine came with C158 bolts, so this may not hold true for those that "only" got units with 9310 bolts, but the extractor springs in mine have the donut AND the elastomer insert inside the spring.
Does this transform your AR to shoot full auto?
Damian on Feb 24, 2019
BEST ANSWER: No. The only difference between a auto bolt and a standard ar15 bolt is the weight and the cut angle on the back. To transform an ar15 to full auto is illegal.
Can this item be shipped to California???
Jay Jay on Apr 4, 2019
Will this make my rifle a machine gun?
Luhe H on Mar 15, 2019
BEST ANSWER: Yes, control burst fire, or full auto. Grab as many as you can before they ban them next month!
Could I use this in a AR pilstol?
Julio L on Feb 19, 2019
BEST ANSWER: You can use this in AR pistol. The full auto BCG is heavier than the semi auto BCG just because pressure and rate of fire for full auto BCG use.
Will this work in a S&W M&P AR 15
Jason G on Jun 4, 2019
BEST ANSWER: Short answer is yes. It’s mil-spec. Mine operate great in Spikes, Aero Precision, PSA. Unless you have some one off upper it should work just fine. My experience are these are really quality BCG’s. You can pay more but you can’t buy better


4.8 / 5.0
540 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great bcg
Great bcg, edges all detailed and machined as they should. Functions Flawlessly. Thanks
August 23, 2019
1 month ago
Shipping was fast and packaging was perfect haven’t had any issues with it and have shot 2 to 3 hundred rounds with it and is still performing like new thank you PSA for your awesome BCG
August 22, 2019
2 months ago
Great product low price
Worked fine no problems just had clean and oil before use
August 22, 2019
2 months ago
Really great bolt carrier group
I have purchased several of them and probably buy more and at a decent price
August 22, 2019
2 months ago
Would definitely buy another.
Great product, shot 160 rounds first day with no issues.
User submitted image
Added Aug 22, 2019
August 22, 2019
2 months ago
Excellent quality
Used this on my wife's build. I'll let the picture speak for itself.
Deadpool 7.5" Pistol
Deadpool 7.5" Pistol
August 20, 2019
5 months ago
Quality for a low price
High quality for a good price!
August 18, 2019
2 months ago
Very good value
Would definitely recommend this bcg to a friend with caveats. I mean let's be honest here,this is a fine, budget bcg, but I will say I have over 750 rounds (of fairly slow semi auto fire)on my premium PSA bcg and after upgrading/replacing the ejector spring I've had no malfunctions or complaints but on any rifle I'm gonna bet my families lives on I'm gonna have to go for a Colt, BCM or Centurion Arms component. Sorry but that's just how it will have to be but this is a well machined bcg with damn nice stacking and a well applied tough coating. Time will tell but so far its definitely worth my money.
August 18, 2019
2 months ago
Way better than I expected.
Definitely will recommend, way better than I expected! Great product, good packing, prompt shipping, buy w/ confidence.
August 18, 2019
1 month ago
Built strong to take it!
This bolt is built to take relentless firing in the military. It will last forever - in a heavily used semi-auto. Nothing takes more punishment in an AR then the BCG. You might find a more slippery one but not one built to last longer.
August 18, 2019
2 months ago

Customers Who Viewed This Item Also Viewed