Shop 4,464 Deals on Upper Receivers

Aero Precision Complete Upper Receiver M4E1-T 14.5in 5.56 Carbine Length Barrel 12in M-LOK ATLAS S-ONE Handguard Anodized Black

VKTR Industries VK Complete Upper with Hux WRX Flash Hider 1210828

SIG SAUER MCX Rattler Upper Receiver Assembly .300 BLK M-LOK Handguard 5.5 inch Black

Aero Precision M5 Complete Upper Receiver 18in 6.5 Creedmoor SS Mid-Length Barrel w/ATLAS R-ONE 15in M-LOK Handguard Anodized Flat Dark Earth

Aero Precision M5 Complete Upper Receiver 20in .308 SS Rifle Barrel w/ATLAS S-ONE 15in M-LOK Handguard Anodized Flat Dark Earth

Ghost Firearms Elite Complete Upper Receiver 5.56x45 NATO 16in Carbine Length 4150 M4 Barrel 1-7 Twist 14in M-LOK Free Float Hand Guard A2 Birdcage

Stag Arms AR-15 Upper Receiver Assembly 5.56x45mm NATO 16" Barrel M4 Polymer Handguard without Bolt Carrier Group or Charging Handle

Andro Corp Industries ACI-15 Essential 16 Semi Automatic Rifle 5.56x45mm NATO 16" Black Threaded Barrel QPQ Black Frame Black Pistol Grip

Radical Firearms RF Upper Assembly 10.5in 5.56 M4 Contour 1/7 Twist 10in RPR M-LOK A2 Flash Hider Black

POF-USA AR-15 Minuteman Upper Receiver Assembly 5.56x45mm NATO 10.5" Barrel Carbine Length 9" M-LOK Handguard Tungsten

Aero Precision M5 Complete Upper Receiver 20in .308 SS Rifle Barrel w/ATLAS R-ONE 15in M-LOK Handguard Anodized Flat Dark Earth

Aero Precision LR-308 M5E1 Upper Receiver Assembly 6.5 Creedmoor 18" Barrel EM-15 M-LOK Handguard without Bolt Carrier Group or Charging Handle Flat Dark Earth

Stag Arms AR-10 Long Range Left Hand Upper Receiver 6.5 Creedmore 24in Barrel HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma Black

Radical Firearms Complete Upper Assembly 16in 5.56 SOCOM 1/7 Twist 12in MHR M-LOK A2 Flash Hider Black

CMMG AR-15 Dissent Mk47 Upper Receiver Assembly 7.62x39mm 16" Barrel

Radical Firearms Upper Assembly 16 inch 5.56 SOCOM mid 15 inch MHR A2 FH w/o BCG and CH Black

Rock River Arms AR-15 Varmint A4 Upper Receiver Assembly 223 Wylde 24" Stainless Steel Barrel 20" M-LOK Handguard Black

Aero Precision M4E1-E Complete Upper 14.5in 5.56 M4 Carbine Barrel EM-12 Handguard Gen 2 Cerakote Flat Dark Earth

Rock River Arms AR-15 Coyote Upper Receiver Assembly 223 Remington (Wylde) 16" Chrome Moly Barrel 12.5" M-LOK Handguard Black

POF-USA AR-15 P415 Edge Upper Receiver Assembly 300 AAC Blackout 10.5" Barrel 9" MRR M-LOK Hanguard Burnt Bronze

CMMG AR-15 Banshee Upper Receiver Assembly 45 ACP 8" Barrel

CMMG AR-15 Banshee Upper Receiver Assembly 45 ACP 5" Barrel

Aero Precision M4E1 Complete Upper Receiver AR-15 5.56x45mm NATO 14.5 in Mid Length Barrel 12 in Quad Rail Handguard No BCG/CH Magpul Cerakote Flat

Aero Precision M5 Complete Upper Receiver 24in 6.5 Creedmoor SS Rifle Barrel w/ATLAS S-ONE 15in M-LOK Handguard Anodized Black