Description

This bolt carrier is manufactured from case hardened 8620 steel with properly staked 4130 steel gas key. The accompanying bolt is case hardened 9310 steel, shot peened, HPT and MPI tested, and finished in a self-lubricating polished black nitride. Bolt lugs are CNC ground following heat treatment to insure the greatest accuracy possible.

Material: Case Hardened 8620 Steel
Finish: Black Nitride. This advanced low friction coating minimizes the need for lubricants.
Gas Key: 4130 Steel attached with Grade 8 hardware and properly staked into a milled “valley” to ensure proper positioning.
Cam Pin: Hardened 4340 cam pin
Firing Pin: Mil Spec firing pin made of 8740 steel, center-less ground and Hard Chrome coated

Bolt Assembly: The Bolt is “true” Mil Spec dimension and external surfaces are CNC ground after heat treat for a precision fit.

Material: Case Hardened 9310 Steel. Carpenter 158 is available for an additional charge.
Finish: All Bolt components Shot Peened and Manganese Phosphate or Black Nitride
Extractor: 4340 Steel , Manganese Phosphate coated o Mil Spec Extractor Spring & O-Ring Combination
MPI: Magnetic Particle Inspected
HPT: High Pressure Test

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Additional Information

Dropship:	No
Platform:	AM-15
Original Store:	ACME Machine
Finish:	Phosphate
Caliber:	5.56
Caliber:	.223
Caliber:	300 BO

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16 Reviews

5
Excellent service

Posted by Anonymous on Dec 25th 2019

Great price, quick shipping. Thanks
5
I like the nickel boron Bolt I thought

Posted by Benton B. on Sep 24th 2018

I like the nickel boron Bolt I thought that was gonna be the way I wet But I ordered this one and I like it just as well
4
so far not a single problem plain but

Posted by Mark A. on Sep 1st 2018

so far not a single problem plain but functional !
4
it hasn't ben tested yet but I am

Posted by MARK A. on Aug 27th 2018

it hasn't ben tested yet but I am pleased with fit and function so far !
5
This assembly looks like it put together right.

Posted by Curtis L. H. on Aug 25th 2018

This assembly looks like it put together right. I will be ordering again.
5
I put it in my bear creek arsenal

Posted by jim w. on Aug 17th 2018

I put it in my bear creek arsenal upper and 30 rounds later no jams, stove pipes, failure to extract. Easy to clean and lube, diffinintly will be buying again.
5
As good as any bcg I have ever

Posted by Chance L. on Jul 17th 2018

As good as any bcg I have ever purchased.
5
Flawless operation with no FTF's or FTE's!!!

Posted by Billy M. on Jul 16th 2018

Flawless operation with no FTF's or FTE's!!!
5
The BCG is installed in an upper, and

Posted by ROBERT B. on Jul 15th 2018

The BCG is installed in an upper, and dry fire functions. I have yet to go to the range, so I cannot comment on live fire function.
5
Rock solid construction, high quality This has a

Posted by THarrison on Jul 7th 2018

Rock solid construction, high quality This has a heavy duty feel to it. Built to last. Precision machining. I highly recommend over other bargain BCG's.