Cobalt Kinetics presents the CK-Pro Receiver Set 11.8" Black, a masterpiece of engineering and design. This premium AR upgrade kit features a proprietary non-rotating upper receiver system, ensuring...

Cobalt Kinetics presents the CK-Pro Receiver Set, a masterpiece of engineering and design. Crafted with precision, this set features a proprietary upper receiver extension that secures the handguard...

Cobalt Kinetics presents the CK-Pro Receiver Set 16" Black, a masterpiece of engineering and design. This premium AR upgrade kit boasts a proprietary non-rotating upper receiver system with 8 TORX...

The Radical Firearms 10.5" HBAR profile 300BLK is a complete MIL-STD upper ready to drop on any MIL-STD lower Receiver. Built with precision engineering, it features a 10" RPR free float rail system...

The LMT Defense MRP-L Quad 13.25 Upper is a marvel of engineering, crafted from a single piece of aerospace-grade aluminum. This monolithic rail platform integrates the handguard and receiver into...

The Aero Precision M4E1 Superlative Arms Piston Complete Upper Receiver Group is a testament to superior design and engineering. This upper receiver is crafted with precision, featuring a 16-inch...

Aero Precision's EPC-9 9/40 Threaded Assembled Upper Receiver w/LRBHO is a testament to engineering excellence, crafted from custom forged 7075-T6 aluminum with an anodized black finish. This upper...

Aero Precision presents the 5.56MM Assembled Upper Receiver No Auto Sear Cut for AR-15 FDE, crafted with precision engineering and high-quality materials. This upper receiver is designed for seamless...

Aero Precision's PISTON UPPER 18IN SS BARREL 15IN HANDGUARD SS SEMI-ONLY showcases exceptional engineering with its Superlative Arms Piston Kit, designed for seamless integration and superior...

The LMT Defense MRP-H MLOK 12.5" Upper Receiver is a marvel of engineering, crafted from aerospace-grade aluminum for unmatched durability and precision. This monolithic design features M-LOK...

Aero Precision's M4E1 300BLK Assemble Upper Gov 16''BBL Pistol-Length Thrd Blk is a testament to superior engineering and design. Featuring a 16-inch barrel with a 1:7 twist rate, this upper receiver...

Geissele Automatics presents the Super Duty MOD1, a complete upper receiver designed for the AR-15 platform. Engineered with precision, it features a 14.5" Cold Hammer Forged barrel, HuxWrx Flash...