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Product Description

Machined from 8620 Tool Steel (Carrier) and 158 Carpenter Steel (Bolt); Shrouded firing pin; Nickel Boron Coating inside and out (Bolt, Carrier, and Gas Key); Forged Mil-Spec gas key attached with Grade 8 hardware and Properly staked; Bolt is shot Peened and HPT/MPI; Mil-Spec Extractor Spring, black extractor insert, Viton O-Ring; Tool Steel Extractor

SPIKE'S M16 Nickel Boron Bolt Carrier Group (ST5BG03)

$181.71
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