5.56x45mm NATO Upper Receivers

Aero Precision Standard Assembled AR-15 Upper Receiver Aluminum Flat Dark Earth

LMT Defense MRP-L M-LOK SPECWAR Assembled Upper 5.56

LMT Defense MRP-L Quad Assembled Upper Receiver 5.56/300 BLK 13.25

Luth-AR M16 A1 AR-15 5.56 NATO Assembled Upper Receiver

Luth-AR M16 A1 AR-15 5.56 NATO Stripped Upper Receiver

VKTR Industries VK-1 Upper 10.5in Nitride Barrel 1 7 Twist 5.56 NATO AR Compatible

DPMS DP15 Oracle II Complete Upper 5.56 16 Threaded Barrel

CMMG MK4 Upper Receiver 223 Remington/556NATO Billet

Battle Arms Development WORKHORSE Complete Upper 5.56 16 Barrel 15 M-LOK Handguard

Battle Arms Development Authority Elite Complete Upper 5.56 16 Threaded Barrel M-Lok Handguard

AR-STONER AR-15 Complete Upper Receiver 5.56x45mm NATO 16" Barrel Mid Length 15" M-LOK Handguard

AR-STONER AR-15 Pistol Complete Upper Receiver 5.56x45mm NATO 8" Barrel Pistol Length M-LOK Handguard

Ar-15 Stripped Upper Receiver - 5.56x45 Nato Stripped Upper Receiver For Ar-15 Black

San Tan Tactical STT PILLAR Billet AR-15 Upper Receiver Black

Colt AR-15 Pistol Complete Upper Receiver 5.56x45mm NATO 14.5" Barrel CMR M-LOK Handguard

Aero Precision AR-15 M4E1-E Barreled Upper Receiver 5.56x45mm NATO 14.5" Barrel 12.7" ATLAS R-ONE Handguard with Pinned Gamma SL Muzzle Device Black

Aero Precision M4E1 Standard Assembled AR-15 Upper Receiver Aluminum Anodized Kodiak Brown

Aero Precision M4E1 Standard Assembled AR-15 Upper Receiver Aluminum Anodized Olive Drab

Aero Precision AR-15 Barreled Upper Receiver 5.56x45mm NATO 16" Barrel MOE SL Mid-Length Handguard Flat Dark Earth

Radian Weapons Model 1 Upper Flat Dark Earth 5.56

Aero Precision M4E1 Standard Assembled AR-15 Upper Receiver Aluminum Flat Dark Earth

LMT Defense MRP-L Quad Assembled Upper Receiver 5.56/.300 Blackout

Luth-AR-15 Government 5.56mm 11.5 Handguard Barrel Assembly

JE Machine Free Float Clamp On AR-15 M-LOK Quadrail Handguard 12" Black