Upper Parts

Proof Research's barrels exemplifies relentless pursuit of excellence. Whatever your preference is, you can expect the finest rifle barrel in the industry.The Carbon Fiber barrel features a full-profile, match-grade 416R stainless steel barrel blanks...

Radian Weapons, Titanium Forward Assist, Raw Titanium Construction Complete Assembly Fits AR-15 This Forward Assist is made of Titanium and features a raw finish. (Complete Assembly)

Spike's Tactical, Barrel, 556NATO, 11.5" Hammer Forged Barrel, 1:7 Twist, Fits AR Rifles, 1/2x28 TPI Thread, Black Finish M249 SAW Chrome Lined Spec Light Weight Profile 1/7 Twist Rate 1/2 X 28 Thread Pitch for Muzzle 5.56 Nato Chamber .625 Gas...

Seekins Precision, Barrel, 308 Winchester, 16" Length, Black Color, Black Oxide Finish, Stainless Steel, Fits AR10 416 Stainless Steel 5/8X24 Threads Black Oxide Coating Every Seekins Barrel is CNC machined to precision match grade...

FN America, Barrel Assembly, 308Win, 13", 1:7 Twist, Fits SCAR 17S The FN SCAR(R) barrel assemblies are cold hammer-forged, chrome-lined MIL-SPEC steel barrels with front sight assembly, gas block assembly, gas regulator, gas piston and flash hider...

FN M4 upper receiver – Cage Code: 3S679 Part: 36295 -M4 feed ramps -Anchor Harvey Forge Marked -Engraved t marks -Hardcoat anodized black -FN Logo engraved on top rear of receiver (NO FWD ASSIST OR PORT DOOR INSTALLED/INCLUDED)

The Aero Precision BREACH is a rugged, ambidextrous, precision-manufactured charging handle for the AR15 platform. The BREACH's design utilizes a reinforced 7075 aluminum bar that is up to the most demanding tasks. Its ambidextrous levers feature a...

Knights Armament Co.'s URX 3.1 13.5" Rail Forend Assembly is a free floating, fully modular replacement forend for the AR-15 platform. Unlike traditional quad rail designs, the URX 3.1 incorporates short sections of M1913 Picatinny rail at its front and...

Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly head spaced. CMMG, Barrel, 300 AAC Blackout, 16.1" Barrel, 1:7 Twist, Carbine 4140 CrMo Salt Bath Nitride...

223 Wylde is a hybrid of the 223 REM and 5.56. 223 Wylde has a chamber throat that is tighter than the 5.56 achieving better accuracy but still reliably functional with 5.56 ammunition. All DI barrels include stainless steel tunable gas block. Odin...

Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly head spaced. CMMG, Barrel, 300 AAC Blackout, 16.1" Barrel, 1:7 Twist, Carbine 4140 CrMo Salt Bath Nitride...

The KAC 3-Prong Flash Eliminator is an extremely effective flash suppressor design that also serves as a platform for attaching a Knight's Armament Quick Disconnect Coupler (QDC) sound suppressor. This muzzle device was engineered to not only neutralize...