Quality AR 15 uppers, AR15 parts, AR-15 rifle manufacturer. Friday Harbor, WA
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5.56/300blk Chrome Lined BCG
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Original Price $129.85
Your Price $99.99
Complete, Mil-Spec assembly with bolt, bolt carrier, and firing pin. Ready to drop into the rifle or carbine upper of your choice.

Mil-Spec MIL-STD-171 Mag-Phos Chrome Lined
Individually MPI Tested
Bolt: 9310-Case hardened, Shot Peened, and MPI tested.
Carrier: 8620 Tool Steel-(M16 full shroud)-Heat Treated, Case Hardened, & Chrome Lined.
Gas Key: Chrome Lined-Grade 8 Hardened Fasteners, Permatex No. 3 sealed, Torqued to 60 in lbs, & Mil-Spec Staked
Cam Pin: 4340 Steel-Heat Treated & Phosphated
Extractor: Tool steel S7-Heat Treated to 48-53 Rockwell C & Phosphated
515 Tucker Ave, Friday Harbor, WA 98250 | sales@hardenedarms.com
Phone: 425-530-0837