Complete Bolt Carrier Group - HP/MPI Tested - Carpenter 158 NP3 Coated Bolt and NP3 coated Cam Pin - *Extractor not NP3 Coated
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100% HP/MPI Tested
Sprinco 5-Coil Heavy Duty Extractor Spring
Nickel PTFE Carrier
SIONICS Bolts are manufactured from Carpenter 158® Steel. Each Bolt is HP/MPI Tested and Inspected. Each Bolt is Shot Peened and comes with a Sprinco Heavy Extractor Spring and Black Spring Insert. The Bolt and Cam Pin with the exception of the Extractor have been NP3 treated to enhance Corrosion Resistance and Carbon build-up.
Our M16 profile Bolt Carriers are machined to USGI specifications. Our M16/M4 carrier includes a Mil-Spec Gas Key. The Gas Key is heat treated per GI specifications and NP3 Coated. The Gas Key is secured to the carrier via USGI domestic manufactured Grade 8 fasteners and properly staked per Military Specifications. These properly hardened parts insure a strong staking and proper gas system function.
Each Carrier Assembly is treated with a durable Nickel/PTFE plating which creates a permanently lubricious surface which reduces the need for lubrication.
*LE/MIL Discount does NOT apply to Holiday Specials