Shop 4,464 Deals on Upper Receivers

Spikes Tactical Upper 5.56 16in M4 LE w/BLK M-LOK Handguard & FSP

CMMG DISSENT Upper Receiver 9mm 6.5in 1-10 Twist 1/2x28 Thread Zeroed Linear Compensator Sniper Grey

Alpha Shooting Sports 16 in 5.56 M-LOK13 Pitchfork Fluted Upper Reciever 1-8 Twist Mid Length

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Complete Build 16in Barrel 15in Lightweight Hybrid M-LOK Handguard Upper Receiver 5/8x24 Nitride Burnt

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Pistol M-LOK Handguard Complete Upper Receiver w/BCG And Charging Handle Flat Dark Earth

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle Sniper Grey

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Micro Pistol 5in Barrel Custom 5in Top Cut Custom M-LOK Handguard Complete Upper Receiver w/BCG

ABC RIFLE COMPANY AR-15 7.62x39mm Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Black

ABC RIFLE COMPANY AR-15 7.62x39mm Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle White

Rock River Arms A2 National Match Upper Receiver Assembly with National Match 1/4x1/4 .040 Hooded Aperture Rear Sight Black

CMMG Mk3 .308WIN Endeavor Upper Group Receiver 24in Coyote Tan

CMMG Mk4 .350 Legend Resolute Upper Group Receiver 16.1in Sniper Grey

DoubleStar DS-4 AR-15/M4 Flattop Upper Heavy Match Barrel 16 inch 5.56/.223 1-9 Twist A1 Muzzle Device Black

Noveske Complete Upper .223 Rem / 5.56 18 Barrel Gen 3 for AR15

Luth-AR Mark 12 Complete Upper Barrel Receiver Assembly 5.56 mm 27in 18in Government Rifle 1x9 1/2x28 PicatinnyKey MOD A2 Flash Hider Anodized

Stag Arms AR-15 Upper Left Hand Receiver 5.56 NATO 16in Barrel NJ Compliant M4 Profile1-7 Twist 1/2 x 28 Thread Compensator Black

Brenton USA Upper Receiver Tracker .223 Remington 22in Barrel 1/2x28 Thread 1-8 Twist Midnight MarbleKote Midnight MarbleKote

Brenton USA Upper Receiver Scout 6mm ARC 18in Barrel 5/8x24 Thread 1-7.5 Twist Foliage MarbleKote Foliage MarbleKote

Brenton USA Upper Receiver Tracker 6mm ARC 22in Barrel 5/8x24 Thread 1-7.5 Twist Autumn MarbleKote Autumn MarbleKote

CMMG Upper Group Resolute Fixed Ejector 9mm 16.1in 1-10 Twist 1/2 X 28 TPI 25.3in Titanium

CMMG Upper Group Resolute Fixed Ejector 9mm 16.1in 1-10 Twist 1/2 X 28 TPI 25.3in Sniper Grey

CMMG Upper Group Dissent Mk47 7.62X39 16.1in Empire Profile Non-Threaded Hard Coat Anodized

CMMG Upper Group Resolute Mk4 .22Lr 16.1in 1-16 Twist 1/2 X 28 TPI 24in Titanium

CMMG Dissent Mk4 .300BLK 16.1in Empire Profile Upper Group Midnight Bronze