Quality AR 15 uppers, AR15 parts, AR-15 rifle manufacturer. Friday Harbor, WA
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458 Big Bore AR15 Upper Assemblies Return To Products
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The 458 is the ultimate big bore cartridge for the AR15 platform. Designed by military contractors to knock down the enemy with a single round the energy on target it delivers is unreal. Compatible with the M4 platform it will fit on your mil-spec lower receiver while replacing your upper, bolt carrier group and magazine. Machined in house 16" .458 4150CMV melonited bull barrels deliver the reliability and accuracy you demand. Capable of shooting 300-600gr .458 SOCOM ammunition the sky's the limit to tune your new AR upper to your mission.

All uppers are test fired, headspaced and sold with a .458 socom bolt carrier group, mil-spec charging handle and a 5rd magazine.

515 Tucker Ave, Friday Harbor, WA 98250 | sales@hardenedarms.com
Phone: 425-530-0837