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...

This complete upper includes the ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. The proprietary ATLAS...

This AR15 Complete Upper features a 14.5" 5.56 MId-Length Barrel with low profile gas block and 12.7" M-LOK Rail.Features :Nitride Finish14.5 Barrel: T Marked UpperMade in the USA

This complete upper includes the ATLAS S-ONE Handguard! The S-ONE line of handguards are 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...

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 APAR308503AC Assembled Receiver 308 Win 7075-T6 Aluminum Black Hard Coat Anodized Receiver for M5 Platform

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

Aero Precision APAR308505C 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 APAR308554M45 M5E1 Enhanced Receiver 6.5 Creedmoor 20" Stainless Steel Barrel, 7075-T6 Aluminum Black Anodized Receiver, Aero Gen2 Enhanced Free-Floating M-LOK Handguard for M5 Platform

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

Aero Precision APAR611310AC Assembled XL Receiver 7075-T6 Aluminum Black Anodized Receiver for AR-15

Aero Precision APAR700201C M4E1 Threaded Receiver 5.56x45mm NATO 7075-T6 Aluminum Black Anodized Receiver for AR-15

Aero Precision APRA600002C 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 KIT50 Upper Parts Kits 50 Beowulf 16" Black Barrel, Aluminum Black 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