Palmetto State Armory 5.56 Premium Full Auto Bolt Carrier Group - 8779

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Palmetto State Armory 5.56 Premium Full Auto Bolt Carrier Group - 8779

In stock

Regular Price: $ 149.99

Special Price $ 69.99

Quick Overview

free shipping Free Shipping applies to this item only and not the entire order.

SKU: 8779
UPC: 8779
MFR#: 8779


  • Milspec Carpenter No. 158® steel bolt
  • Shot Peened Bolt
  • High pressure tested
  • Mag particle inspected
  • Chrome Lined Carrier (AUTO)
  • Chrome Lined Gas Key
  • Gas Key Hardened to USGI Specifications
  • Gas Key Grade 8 Hardened Fasteners
  • Gas Key Staked Per Mil-Spec
  • Tool Steel Extractor
  • Extractor Spring
  • Extractor O-ring Insert
  • SKU 8779

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Made in USA.  Bolt is made of Mil-spec Carpenter 158 steel, Shot peened, High pressure tested and Mag Particle Inspected.   Gas key is machined out of bar stock, chrome lined phosphate coated, and secured with grade 8 fasteners and staked per mil-spec. Bolt carrier is phosphated outside and chrome lined inside.  Laser engraved with the PSA logo.

For packaging considerations, BCG will be packed dry.  As a result, it will have a grey, dusty appearance that will turn  black with the application of CLP or other preferred lubricant.

  • Extractor Spring
  • Black Extractor Insert
  • Mil-Spec O-Ring
SKU: 8779
SKU 8779
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
SKU: 8779

Questions and Answers

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Browse 11 questions Browse 11 questions and 80 answers
Will this bolt turn my ar into a full auto gun? Or what else would I need to make that happen. New to this and was just curious thanks!
Mckay B on Apr 13, 2018
BEST ANSWER: No this will not turn the AR into a full auto. You have to add an auto sear to the lower reciever. However if youi do this you will risk jail time and and a hefty fine ffrom the ATF. All full auto weapons to be legal must have an AFT Form 4 tas stamp. The advantage of the full outo bolt is the weight. It assists with smoother cycling.
will this also work with .223 wylde?
edge1916 on Apr 16, 2018
BEST ANSWER: If you have to ask let me point you in the direction of the marlin 22lr rifle.
Will it make my M4 automatic?
Little Joey on May 27, 2018
BEST ANSWER: Only if you have the shoulder thing that goes up. Also, it may require you to make pew noises to jump start ot.
Looking to replace factory tiger ar556 bcg with a full auto bcg for reliability and fast firing. Will it work?
James H on Apr 14, 2018
BEST ANSWER: Where do you guys come from? Just funny to read some of the questions. You got no business with a MSR.
Will this work the same for 300 blackout as well as 556?
Madison B on May 13, 2018
BEST ANSWER: Yes, a 5.56 BCG will work in a .300 (Obviously, use a .300 barrel.) The rest of the AR can use standard 5.56/AR parts. Check out this article on alternative AR calibers:
Check out Pew Pew Tactical's read on "Best Alternative AR-15 Cartridges and Calibers"
Does each part in this Premium BCG meet or exceed mil. spec.?
jay G on Jun 7, 2018
BEST ANSWER: Much better than "mil. spec. I have bought @5 of these...They are great....
Will this work in an ar15 pistol?
Cody P on Aug 21, 2018
BEST ANSWER: It should work in any standard ar pistol, carbine, and rifle
If Kavanaugh gets confirmed and I combine this with a 40 or 60 round magazine, will I cause a rift in the space-time continuum?
BillyBadassBgRg on Sep 11, 2018
BEST ANSWER: Yes, but the rift will only occur if you use a 1:7 twist barrel and premium ammunition that exceeds 3000 fps at the muzzle. I may have to recommend at least an 18 inch barrel to ensure velocities that will disrupt the time-space continuum under stated conditions given this formula: f ′ = 2 π ℏ ( E ′ 1 − E ′ 0 ) = f ( 1 − G M R c 2 )
Who makes these carriers and bolts? Thanks
Mandrin S on Aug 21, 2018
BEST ANSWER: The largely subjective, but widely accepted answer is Toolcraft. PS has brought a lot of companies in to the fold over the last few years. As they are not publicly owned, there is no way to know for sure. That being said, I absolutely do not believe PSA would try and and claim that a bolt was HPT/MPI when they sell so many that aren't. Point being, who makes it is irrelevant so long as it's a quality product.
I'm very new to this but could you tell me if that includes a firing pin?
Michael K on Jun 5, 2018
BEST ANSWER: Yes, this assembly includes the Firing Pin, the Firing Pin Retaining Pin, the Bolt and the Bolt Cam Pin.
Question Would a fotech echo 2 trigger work with my current bolt carrier or do I need buy this auto bolt carrier?
Mitchell B on Sep 19, 2018


4.6 / 5.0
334 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
It takes a few hundred rounds for the bolt to break in. During that time you need to take it apart and oil it real well to keep it going. I would buy again.
September 18, 2018
10 months ago
Just what I needed. Awesome price and quality.
September 13, 2018
2 months ago
Great place for all your needs when dealing with guns and ammunition
I have purchased a lot of great parts from palmetto and I have never had any problems.Everything fits perfectly together well machined everything is tight.Palmetto is my place to buy parts.The BCG 8779 is a great fit in the 556 I put together no problems at all.I plan to buy and build more in the future.
September 12, 2018
2 months ago
Will not cycle
I purchased this BCG for my recent build. The bolt gets stuck in the carrier and when I install the BCG into the build it gets stuck within my upper receiver.

I thought maybe it was my upper until I used my other BCG and that is not the problem.
September 12, 2018
Response from Palmetto State Armory
We do apologize for that. Please contact Customer Service so we may resolve this issue.
September 13, 2018
Casey S
Del ton fix
This bolt carrier group fixed a Del ton rifle that they could not fix at the factory.
September 11, 2018
2 months ago
After about thousand rounds the gas rings started to fall apart on the bolt. I expected for those to hold up for at least several thousand rounds. I clean and lube regularly I don't see any reason for this to happen.
September 11, 2018
Response from Palmetto State Armory
We do apologize for that. Please contact Customer Service so we may resolve this issue.
September 11, 2018
Casey S
Bcg charge handle
Worked fine no issues.Will buy again.
September 7, 2018
7 months ago
nice BCG
considering this has all the proper mil spec qualifications and worked perfect out the box, you can't beat PSA for great priced deals
September 5, 2018
3 months ago
Very nice particularly for the price! 100% recommend!
A little rough on the break in, but runs flawlessly. Haven't had any failures from either I bought but the first 500 rounds felt a little gritty on first charge. No more grit and still no related issues!
September 3, 2018
2 months ago
works as described but with one issue...Not well staked on one hole.
September 1, 2018
2 months ago

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