Shop 4,464 Deals on Upper Receivers

Radical Firearms Complete Upper Assembly 16in 458 SOCOM .936 1/14 Twist 12in MHR M-LOK Panzer Brake Black

POF USA Rogue Upper Receiver Assembly Rifle Length 14in Handguard 20in Barrel 5/8x24 M-LOK Micro B Muzzle Break Black

Radical Firearms 16in 350 Legend Barreled Upper Receiver Black

Spikes Tactical Upper 5.56 14.5in 16in OAL Midlength Lightweight LE w/12in SAR3 Rail w/ Vortex FH

Spikes Tactical Upper 5.56 14.5in 16in OAL Midlength Lightweight LE w/12in BAR2 Rail - w/Dynacomp Ext.

Adams Arms FGAA01364 P2 Complete Piston Upper 300 Blackout 16 in Black Nitride Barrel, Aluminum Black Receiver, AARS M-LOK Handguard for AR-Platform

ABC RIFLE COMPANY AR-15 Micro Pistol Build 5.56x45mm NATO 5in Barrel 4in M-LOK Handguard Upper Receiver Olive Drab Green

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

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Red

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

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Flat Dark Earth

Luth-AR 24 in Bull Rifle kit minus Lower Receiver w/coll. Stock M-Lok Black Carbine

Aero Precision M4E1-T PRO CHF M4 5.56mm 14.5 inch Complete Upper Receiver Hanson Mid Length 1-7 Twist A2 Birdcage Anodized OD Green

Aero Precision M4E1-T PRO 5.56x45 16 in Upper Receiver Hanson Mid Length 1-7 Twist A2 Birdcage OD Green 11D112-1

Brenton USA Upper Receiver Scout 6.5mm Grendel 18in Barrel 5/8x24 Thread 1-8 Twist Foliage MarbleKote Foliage MarbleKote

Brenton USA Upper Receiver Scout .300 Blackout 18in Barrel 5/8x24 Thread 1-8 Twist Harvest MarbleKote Harvest MarbleKote

Brenton USA Upper Receiver Tracker .350 Legend 22in Barrel 9/16x24 Thread 1-16 Twist Foliage MarbleKote Foliage MarbleKote

Brenton USA Upper Receiver Scout .450 Bushmaster 18in Barrel 11/16x24 Thread 1-24 Twist Midnight MarbleKote Midnight MarbleKote

Brenton USA Upper Receiver Tracker .450 Bushmaster 22in Barrel 11/16x24 Thread 1-24 Twist Harvest MarbleKote Snow MarbleKote

Troy Upper Receiver Assembly AR-15 A3 223 Wylde 14.5in Barrel Ultra-Low Profile 12.5in SOCC Handguard Black

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

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

TRYBE Defense AR-15 Pistol Semi-Complete Upper M-LOK w/o BCG or Charging Handle 10.5in .300 Blackout 4140 CMV Black

Killer Innovations Icon Defense AR-15 Ambidextrous Billet Upper Receiver Flared Black