Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

Upgraded Design For Increased Durability & Dependability

Updated design of the standard AR-15 bolt features a fully supported breech face and a dual-spring extractor system for extra strength and reliability to handle the 6.8 Remington SPC cartridge. Machined from an extremely hard steel alloy normally used in high-stress/heat applications like race car transmissions, then shot-peened and x-rayed for flaws before plating with a nickel-boron (NiB) coating. NiB coating significantly reduces friction coefficient, so the bolt is less likely to be hung up by fouling, and wear-resistance is greatly enhanced. Super-slick surface makes cleanup easy because carbon and gunk have a hard time sticking to it.

AR-15, Issue:10, Page:011
Big Book Catalog, Issue:67, Page:012

SPECS: Ultra-hard steel alloy, nickel-boron plated, silver finish. Comes complete with ejector, extractor, and gas rings installed. Fits a standard AR-15 carrier.


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Caliber: 270/6.8 mm (.277)

Finish: Nickel-Boron

Hand: Right