Shop 4,462 Deals on Upper Receivers

Sons of Liberty Gun Works East India Starter Kit Combat Grade 14.5in 5.56mm Black

Radian Weapons Upper/Handguard Set Brown 5.56

Radian Weapons Upper/Handguard Set, Cerakote Finish, Gray, Fits AR-15, Includes 8.5 in MLOK Handguard, Radian Raptor-SD Charging Handle R0646

Noveske Chainsaw Complete Upper .300 AAC Blackout 8 Barrel

Spikes Tactical 16" Classic Upper 5.56x45mm/.223 Remington 1:7 Quad Rail Mid-Length, Black

Aero Precision AR-15 16" MOE Upper 5.56x45mm 1:7 MOE M-LOK Rail SL Mid-Length, Flat Dark Earth

Luth-AR 16" Lightweight Barrel Complete Upper Receiver For 223 Rem/556NATO, Black - BAA3-L16

Primary Weapons Systems MK114 Mod 2-M 14.50" Upper .223 Wylde 1:8 M-LOK Rail Mid-Length, Black

Radian Weapons Model 1 Complete Upper Gray .300 AAC Blackout 9 Barrel

Sons of Liberty Gun Works East India Starter Kit Combat Grade 12.5in 5.56mm Black

Radian Weapons Model 1 Builder Kit Brown 5.56 10 Handguard

Battle Arms Development Authority Elite, Complete Upper Receiver, 556NATO, 10.5 in Barrel, Fits AR-15, M-Lok Handguard, Anodized Finish, Sniper Gray, Includes Bad Rack-15 C Ambidextrous Charging Handle and AR15/M16 BCG BAD-AUTH-UR10.5G-Y-15C

Battle Arms Development WORKHORSE, Complete Upper Receiver, 556NATO, 10.5 in Barrel, Fits AR-15, M-Lok Handguard, Anodized Finish, Black, Includes Bad Rack-15 C Ambidextrous Charging Handle and AR15/M16 BCG WH-UR10.5B-Y-15C

Rise Armament 18" Upper .22 ARC 1:7 Free Float M-LOK Picatinny Rail Aluminum Rifle-Length, Black

Sig Sauer MCX SURG 5.56x45mm Suppressed Upper Receiver Kit w/ Folding Stock & Adapter (NFA) UAMCXA-SURG

Spikes Tactical .223 Rem/5.56 16" Barrel Complete Upper Assembly, Mil-Spec Phosphate Coated, 9" Black Free Float BAR2 Rail - STU5025-R9S

Faxon Firearms ION Ultralight 14.50" Upper 5.56x45mm M-LOK Rail, Black

Radian Weapons 10.5" Complete Upper .223 Wylde 1:8, Black - R0023

CMMG Resolute MK4 6mm ARC Upper with 16.1" Barrel, Black - 60B1091AB

Rock River Arms Coyote Carbine 16" Classic Upper .300 AAC Blackout 1:8 M-LOK Pistol-Length with BCG and CH, Black - BLK0592

Rock River Arms MID A4 16" Classic Upper .450 Bushmaster 1:24 M-LOK Mid-Length with BCG and CH, Black - Enhanced Durability - 450B0592

Radian Weapons Model 1 MOE Upper M-LOK Rail with Charging Handle, Flat Dark Earth - Precision Carbine - R0627

Radian Weapons Model 1 MOE Upper M-LOK Rail with Charging Handle, Gray - Versatile Tactical - R0625

Battle Arms Authority Elite 16" Upper 5.56x45mm Free Float M-LOK Rail, Black