Set your AR15 up with one of the largest and hardest hitting calibers available, the .458. Built using our carbine length gas system 4150CMV bull barrel, a 10" free float HD Quad rail and a Citadel(TM) pepper pot flash hider. This upper will attach to all standard mil-spec lower receivers and runs with the reliability and accuracy only Hardened Arms can deliver.
Shoots 458 Socom Ammo
AR-15 Upper Receiver Assembly:
Hardened Arms single M4 style Feed Ramp Flat Top Receiver Single Feed ramp for increased feeding reliability on barrel and upper Melonited 4150CMV .458 Big Bore 4150CMV High End Barrel Black Melonite Finish 1/14 Barrel Twist Chambered in .458 Big Bore 16" Bull Barrel Profile barrel with M4 Extension .936" diameter at gas block 5/8x32 threaded muzzle/barrel Low profile bull barrel gas block Barrel dimpled to secure gas block Carbine length gas system Citadel Pepper Pot Flash hider Free float 10" HD quad rail
458 Big Bore BCG,Charging Handle and 5 rd magazine:
Melonited 458 Big Bore AR15 bolt carrier group mil-spec Charging handle 5 rd 458 Big Bore AR15 magazine
Hardened Arms rifles 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 rifle, and rifle restrictions. A 20% restocking fee will apply if you cancel anytime after ordering or 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.