The M4E1 Threaded Upper Receiver features a new angular machined design that helps it stand apart from standard mil-spec upper receivers. This upper receiver features the same enhanced body profile as their M4E1 Enhanced Upper Receiver but is threaded to...

The M5 .308 Assembled Upper Receiver comes with both the port door and forward assist hardware preinstalled. Forged from 7075-T6 aluminum, this assembled upper is precision machined to accept standard .308 components and is the perfect upper for your big...

The M5 .308 Assembled Upper Receiver comes with both the port door and forward assist hardware preinstalled. Forged from 7075-T6 aluminum, this assembled upper is precision machined to accept standard .308 components and is the perfect upper for your big...

The M5 308 come with the S-ONE line of handguards which is designed with size and weight in mind, providing the perfect addition to your lightweight build. The proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining...

Aero Precision APAR308505AC Assembled Receiver 308 Win 7075-T6 Aluminum Flat Dark Earth Cerakote Receiver for M5 Platform

Aero Precision APAR308506AC M5E1 Enhanced Receiver 308 Win 7075-T6 Aluminum Flat Dark Earth Cerakote Receiver for M5 Platform

Aero Precision APAR600201AC M4E1 Enhanced Receiver 5.56x45mm NATO 7075-T6 Aluminum Black Anodized Receiver for AR-15

Aero Precision APRA600002C MOD 4 6061-T6 Aluminum

Aero Precision APRA600003C MOD 4 6061-T6 Aluminum

Aero Precision APRA600004C MOD 4 6061-T6 Aluminum

Aero Precision APRA600006C MOD 4 6061-T6 Aluminum

Aim Sports AR5CUB3 Complete Upper Assembly 5.56x45mm NATO 16" Black Nitride Barrel 7075-T6 Aluminum Black Hard Coat Anodized Receiver 15" M-LOK Free-Float Handguard for AR-15

Aim Sports AR5CUB5 Complete Build Kit 5.56x45mm NATO 16" Aluminum Black Hard Coat Anodized Receiver for AR-15

Alexander Arms KIT5012 Upper Kit 50 Beowulf 12"

Alexander Arms UHU65BL Hunter Complete Upper 6.5 Grendel 18" Black Aluminum Cerakote Receiver M-LOK Handguard for AR-15

Alexander Arms UST17 Upper Parts Kits 17 HMR 18" Black Cerakote Aluminum Receiver M-LOK Handguard for AR-15 Includes 2 Mags

Alexander Arms UTA50 Tactical Complete Upper 50 Beowulf 16" Black Cerakote Aluminum Receiver M-LOK Handguard for AR-15

Alexander Arms UTA65 Tactical Complete Upper 6.5 Grendel 16" Black Cerakote Aluminum Receiver M-LOK Handguard for AR-15

Battle Arms Development BAD-PCC-UR Xiphos Upper Receiver 9mm Aluminum Black Hardcoat Anodize Receiver

Battle Arms Development WH556-URS Workhorse Upper Receiver Aluminum Black Anodized Receiver for AR15/M4

Battle Arms Development WH556-URS-ODG Workhorse Upper Receiver Aluminum OD Green Anodized Receiver for AR15/M4

BCM 4URM4 BCM M4 Upper Assembly Multi-Caliber 7075-T6 Aluminum Black Anodized Receiver for AR-15

Black Rain Ordnance BROCARNIVORE450B Carnivore 450 Bushmaster 16" for AR-15

Bushmaster 0040004BLK M4 Patrolman's Upper 5.56x45mm NATO 16" Black Nitride Barrel, 7075-T6 Aluminum Black Receiver, M4 Handguard for AR-Platform