Shop 4,464 Deals on Upper Receivers

Geissele Super Duty Stripped Upper Receiver 5.56mm 10.3in Barrel Carbine Length 1-7 Twist Black 10.3in

Aero Precision Complete Upper Receiver M4E1-T 10in .300 Blackout Barrel 9in M-LOK ATLAS S-ONE Handguard Cerakote Flat Dark Earth

Aero Precision AR-15 M4E1-E Upper Assembly 5.56x45mm NATO 14.5" Barrel 12.7" EM Gen2 Enhanced Handguard Flat Dark Earth

Aero Precision M4E1 Upper Receiver AR-15 5.56x45mm NATO 7 in M-LOK Handguard No BCG/Charging Handle Magpul Cerakote Flat Dark Earth

Cobalt Kinetics STRIPPD URG 10.8 FDE

Aero Precision M5 Complete Upper Receiver 18in .308 Rifle Barrel w/ATLAS R-ONE 15in M-LOK Handguard Anodized Flat Dark Earth

Aero Precision M4E1 Threaded No Forward Assist Complete Upper Receiver 10.5in 5.56 Carbine SM9.2 Anodized Black

Aero Precision M4E1 Threaded .223 Wylde Complete Upper Receiver 18in Wylde SS QPQ Rifle Length 1-8 Twist A2 Flash Hider 15 in M-LOK ATLAS R-ONE

Aero Precision Complete Upper M5 6.5 Creedmoor 24in Rifle Length 1/8 Twist Stainless Steel w/ ATLAS S-ONE Handguard FDE

Aero Precision Complete Upper Receiver M4E1-T 20in 5.56 Rifle Length Barrel 15in M-LOK ATLAS S-ONE Handguard Anodized Black

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps Stripped NiB-X Flat Dark Earth 1-NIBXUF-Flat Dark Earth

Aero Precision Complete Upper Receiver w/Flash Hider M4E1 .300 Barrel EM-9 HG No BCG/Charging Handle Gen 2 FDE Cerakote 10in APAR600222M4

Matador Arms MAT-9 Roller Delayed Bufferless Upper Receiver Assembly 9mm Luger 7.8" Barrel Black

Aero Precision LR-308 M5 Upper Receiver Assembly 308 Winchester 16" Barrel Atlas R-One M-LOK Handguard without Bolt Carrier Group or Charging Handle Anodized Olive Drab

Aero Precision LR-308 M5 Upper Receiver Assembly 308 Winchester 16" Barrel Atlas R-One M-LOK Handguard without Bolt Carrier Group or Charging Handle Anodized Kodiak Brown

Aero Precision M4E1 Threaded No Forward Assist Complete Upper Receiver 16in 5.56 Mid SM15 Anodized Black

Aero Precision Complete Upper Receiver w/ ATLAS S-ONE Handguard M5 24in Barrel 6.5mm Creedmoor Rifle Length SM15 Anodized Black

Aero Precision LR-308 M5E1 Upper Assembly 308 Winchester 20" Barrel 16.6" EM Gen2 Enhanced Handguard Flat Dark Earth

Aero Precision M4E1 Mid Barrel Complete Upper Receiver w/Flash Hider AR-15 5.56x45mm NATO 16in Mid Length Barrel 15in Quad Rail Handguard No BCG/CH

Aero Precision M4E1-E EM16.6 Complete Upper .223 Wylde 18inch SPR Rifle 1-8 Twist 1/2 x 28 Thread Anodized Black

Aero Precision M5E1 Complete Upper Reciever .308 18in Rifle Barrel 1-10 Twist 5/8x24 Thread Free-Float Handguard Stainless Steel Anodized Black

Aero Precision Complete Upper Receiver M4E1-T .223 16in Wylde Barrel 15in M-LOK ATLAS S-ONE Handguard Anodized Black

Aero Precision AR-15 M4E1-T Upper Receiver Assembly 5.56x45mm NATO 18" Barrel SM15 Handguard FDE

Aero Precision LR-308 M5E1 Upper Assembly 308 Winchester 18" Barrel 16.6" EM Gen2 Enhanced Handguard Black