AR Parts in 5.56x45mm NATO

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

M4e1 Enhanced 5.56 Nato Assembled Upper Receiver For Ar-15 - M4e1 Enhanced 5.56mm Assembled Upper Receiver For Ar-15 Odg

Aero Precision Upper Receiver Assembled AR-15 M-LOK Handguard Ceracote Burnt Bronze

Aero Precision M4E1 AR15 5.56mm 8in M-LOK Threaded Upper Receiver Pistol Length 1-7 Twist 1/2x28 A2 Flash Hider 7.3in M-LOK R-ONE Handguard Cerakote

Aero Precision M4E1-E AR15 5.56mm 8in M-LOK Upper Receiver Heavy Pistol Length 1-7 Twist 1/2x28 A2 Flash Hider 7.3in EM Handguard Cerakote FDE

Aero Precision Standard Upper Receiver Assembled AR-15 Aluminum Sniper Gray

AERO PRECISION Gen-2 Enhanced 16.6" M-LOK AR-15 Handguard

AERO PRECISION 5.56 Bolt Carrier Group, Complete - Nickel Boron

M4e1 5.56mm Assembled Upper Receiver W/Atlas R-One Handguard - M4e1 5.56mm Assembled Upper M4 10.5''''bbl Carbine Threaded Fde

Ballistic Advantage AR-15 5.56/.223 Bolt Carrier Group - Black Nitride

BALLISTIC ADVANTAGE Breach Large Lever Black Fits AR-15

AMERICAN TACTICAL IMPORTS Milsport Upper 5.56 7.5" MLOK No Handle/BCG

Sr-15 Ks-1 5.56 Nato Assembled Upper Receiver - Sr-15 Ks-1 5.56 Nato 13.7'''' Bbl Assembled Upper Rcvr Black

Knight's Armament URX 3.1 5.56 Free-Floating Handguard - 13.5"

Radian Weapons Model 1 Upper Receiver and Hand Guard Set 17 in M-LOK Radian Grey

RADIAN WEAPONS Raptor-SD Ambi Charging Handle AR15/M16 Grey

Timber Creek 5.56 10.5in Medium Profile Barrel Nitride Black TC 556 10

Faxon Firearms Duty Series AR-15 5.56 Nato Threaded AR Barrel 11.5in Gunner Profile Carbine Length 1-8 Twist Black

SPIKES TACTICAL Barrel 5.56 16" LE Mid Black

SPIKES TACTICAL BBL 5.56 16IN LE M4 CARBINE BL

Daniel Defense AR-15 Barrel 5.56x45mm NATO 16" Lightweight Contour 1:7" Twist Matte with Low Profile Gas Block

Ar-15 Breach Small Levers Charging Handle Ambidextrous - Breach Charging Handle Ambi Small Levers For Ar-15 Blk/Tan

AERO PRECISION AR15 15" Quantum M-LOK Handguard FDE w/ BAR Barrel

M4e1 Assembled Upper Receiver 18'''' 5.56 Rifle Length - M4e1 5.56mm Assem Uppr Rcvr Govt 18'''' Bbl Rifle-Length Blk