Upper Receivers

Centurion Arms MK11 Billet 7.62 Upper Receiver - RAL 8000 The Centurion Arms MK11 7.62 Billet Upper Receiver is engineered for builders who demand elite compatibility, rugged durability, and flawless performance. CNC-machined from billet 7075-T6...

Centurion Arms MK11 Billet 7.62 Upper Receiver The Centurion Arms MK11 7.62 Billet Upper Receiver is engineered for builders who demand elite compatibility, rugged durability, and flawless performance. CNC-machined from billet 7075-T6 aerospace-grade...

Bootleg AR15 Stripped Billet Upper Receiver - Black The Bootleg Billet Upper Receiver is a purpose-built upgrade for AR-15 platforms, offering exceptional durability and refined handling in a minimalist package. Engineered from premium billet aluminum...

AR Upper Receiver with Forward Assist and Ejection Port Cover Assembly Installed, Forged 7075 Aluminum, T-Marked, Interior is Dry Film Lube

Complete A2 rear sight kit, this kit requires assembly and will mount on an A2 upper receiver. Luth-AR, A2 Rear Sight Kit, Fits A2 Upper Receivers For AR-15 Firarms, Black UR-29 A2 Rear Base Lug (x1) UR-27 A2 Rear Sight Aperture (x1) UR-28 Rear...

Luth-AR M16 A1 Assembled Upper Receiver - Black  Looking to build a high-quality retro looking AR? Start your project with a complete A1 upper receiver anodized. Comes with the standard features of a Mil-Spec upper receiver and is forged from...

Luth-AR A3 Upper Receiver Parts Kit The A3 Upper Receiver Parts Kit for AR-15 includes the ejection port cover, ejection port rod, ejection port C-clip, ejection port spring, forward assist button, forward assist spring and forward assist pin. Fits...

The CMMG AR-15 Hand Guard Slip Ring Kit is what you need to secure your handguard. Fits AR-15 Platform Firearms. Does NOT fit .308 AR Firearms. CMMG, Hand Guard Slip Ring Kit, Includes Slip Ring, Spring, and Retaining Ring, Black Fits AR-15...

 Spike's Tactical, Generation 2, Billet, Upper, 223 Remington, 556NATO, Black, Mil-Spec Barrel Nut

LBE Unlimited is a leading producer of US Made gun parts and accessories, particularly for the AR-15 platform. Whether you're in the middle of an AR build or you're just looking to upgrade a key component, LBE has you covered with reliable parts and...

Luth-AR stripped .223 Remington receivers are A3 flattop with M4-type feed ramp, 12 position Picatinny accessory rail for mounting scopes or flip-up sights. Shell deflector, forward assist housing, and ready for an ejection port cover. Precision machined...

Includes Mk3 ejection port cover, rod, and spring. CMMG, Ejection Port Cover Kit, Mk3, Ejection Port, Rod, and Spring, Black Finish .308 Ejection port cover Spring Rod