Aero Precision's M4E1 5.56 Assembled Upper Receiver with the ATLAS S-ONE Handguard is a testament to superior design and engineering. Featuring a lightweight build with a slim profile, this upper receiver includes an 11.5" carbine barrel made from...

The CMMG RESOLUTE MK4 UPPER GROUP 300BLK 16.1 BLK is a testament to superior engineering and design. Crafted for versatility, this upper group is perfect for completing your next carbine build. It features a 16.1-inch barrel with a 1:7 twist, made fr…

Aero Precision presents the M4E1 5.56 Assembled Upper with an 11.5'' barrel, designed for precision and reliability. This upper receiver features a government profile barrel, carbine-length gas system, and an anodized black finish, ensuring durabilit…

Aero Precision's M4E1 5.56 Assembled Upper Receiver Threaded with AR15 Semi-Cut Black showcases a new angular machined design, setting it apart from standard mil-spec upper receivers. Crafted from 7075-T6 Aluminum, it is precision machined to work...

The AERO M4E1-T Complete Upper is a testament to Aero Precision's commitment to quality and innovation. This upper features an 18" .223 Wylde QPQ rifle length barrel, designed for precision and reliability. The ATLAS R-ONE handguard offers a sleek de…

The CMMG DISSENT Upper Group 9mm 10.5 BLK is a testament to innovative design and engineering excellence. Featuring a 10.5-inch barrel, this upper group utilizes CMMG's patent-pending Compact Action and Radial Delayed Blowback technology, housing the…

Aero Precision's EPC-9 9MM Assembled Upper Threaded 8.3'' BBL 7.3'' Handguard is engineered with precision and quality. This upper receiver is crafted from custom forged 7075-T6 aluminum, offering a robust and reliable platform for your AR-15. The...

The Aero Precision EPC-9 9MM Assembled Upper Threaded 5.5'' BBL 4.8'' Handguard showcases exceptional engineering and design quality. This complete upper receiver is crafted for seamless installation and optimal performance, featuring a robust anodiz…

Aero Precision's M4E1 350 Legend Assembled Upper M4 20'' Carbine Threaded FDE is engineered for precision and reliability. Crafted with a Cerakote finish and aircraft aluminum, it features a 20-inch barrel with a 1/16 twist rate, ensuring optimal...

The Aero Precision M5 Complete Upper 16" .308 Mid is a testament to Aero Precision's commitment to quality engineering and design. This upper receiver is crafted with precision, featuring a 16-inch barrel and a mid-length gas system, ensuring reliabl…

The CMMG Banshee Mk4 AR-15 Upper Group in .338 ARC combines the renowned AR15 platform with the power of a large bore caliber. This upper group is engineered for versatility, offering more energy on target and less gas system tuning when switching fr…

The Aero Precision M4E1 Assembled Gen 2 Upper Receiver 7.5" Pistol Length is a testament to precision engineering and high-quality design. Crafted from 7075 T6 aluminum, it features a hard coat anodized finish for durability. The M4E1's enhanced...