We are pleased to announce the arrival of the Ultimate package in the 6.8 SPC II caliber! Custom machined in-house and hand polished. We start with the very best steel, 4150 CMV and then Black Nitride the barrel. We run a 1:10 twist to stabilize the heavier ammunition which affords a higher accuracy return.
Hardened Arms M4 Feed Ramp Flat Top Receiver Black anodized mil-spec finished upper receiver Feed ramps for increased feeding reliability on barrel and upper Laser etched T-Marked upper receiver 4150CMV 6.8 SPC II Barrel Black Melonited/QPQ Finish Stress Relieved for superior accuracy Chambered in 6.8 SPC II 16" HBAR Profile barrel with M4 Extension 1:10 twist .750" barrel diameter at gas block 5/8x24 threaded muzzle/barrel Low profile gas block Barrel dimpled to secure gas block Mid- length gas system A2 flash hider 12" Tactical Quad Rail rail (End cap option is available)
Fits any mil-spec AR15 lower receiver.
Hardened Arms uppers are high end, accurate, head spaced, inspected and test fired prior to shipping. They are built using stringent specs, top quality parts and procedures to ensure maximum reliability and performance.
You are responsible for knowing your state laws regarding barrel lengths, pistol, Short barreled rife restrictions. 20% restocking fees if you can not take delivery due to state restriction. Dealer programs are available on our website. Two year warranty against manufacturer defects. Finishes will wear with use, no warranties apply to finish wear.