ABARMS CATALOG 2018
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A B Arms A B Pro 5.56 Bolt Carrier Groups are ready to drop into your rifle. Our Bolt Carrier Groups<br />
are specially made on high end Swiss machinery to have exacting tolerances and surface finish. A B<br />
Arms is known by rifle manufacturers for manufacturing one of the finest quality bolts and<br />
extractors available. This has won us contracts with some of the highe st quality AR manufacturers<br />
in the business.<br />
Bolt<br />
Each bolt is machined out of MPI<br />
tested Carpenter 9310 Steel. They<br />
are heat treated, shot peened as<br />
per Mil-Spec requirements and<br />
coated with Nickel Boron.<br />
Extractor<br />
Every extractor is made of<br />
are all heat treated, shot peened<br />
as per Mil-Spec requirements<br />
and coated in a Manganese<br />
Firing Pin<br />
Made from AISI 8740 steel and<br />
are chrome coated.<br />
Carrier<br />
8620 material, M-16 style,<br />
nickel boron coated.<br />
Cam Pin<br />
All cam pins are made of E4140<br />
Steel and are heat treated as per<br />
Mil-Spec requirements. They are<br />
also coated with Nickel Boron.<br />
Bolt Carrier Gas Key<br />
4130<br />
material, nickel boron coated,<br />
4140 staked gas<br />
Mil-Spec Requirements.<br />
key screws per<br />
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