Results for 5.56x45mm NATO AR Rifles

Colt LE6944P 5.56mm 14.5" Bbl Piston One Piece Matte Black Upper Receiver Conversion Kit LE6944PCK

Colt M4 to M5 PDW 5.56 x 45mm 10.3" Heavy Bbl Matte Black Conversion Kit CM556-10H-CK

Fightlite Industries Mcr Belt-Fed Upper Ar-15 5.56 Nato 16.25in

LWRC International LWRC IC-SPR 5.56mm NATO 16.1" 1:7" 1/2x28 Bbl Black Complete Upper Receiver ICU5B16SPR

LWRC International LWRC ICDI M-LOK Direct Impingement 5.56mm NATO 16.1" 1:7" 1/2x28 Bbl Black Complete Upper Receiver ICDIU5B16ML

Brigade Manufacturing 5.56 Forged 10.5" 30+1 Tungsten Gray

DEL-TON AR-15 16" Mid-Length Flat Top Barrel Assembly

DEL-TON AR-15 20" Flat Top Barrel Assembly

AERO PRECISION M4E1-T Complete Upper 16" 5.56 Gov Mid MOD4 15 Blk

M4e1 Assembled Upper Receiver Threaded 5.56mm Fde - M4e1 5.56 Assembled Upper Rcvr Threaded W/Ar15 Semi-Cut Blk

Aero Precision Complete Upper Receiver M4E1-T 14.5in 5.56 Mid Barrel 12in M-LOK ATLAS S-ONE Handguard Flat Dark Earth

Aero Precision Complete Upper Receiver M4E1-T 14.5in 5.56 Carbine Length Barrel 12in M-LOK ATLAS S-ONE Handguard Flat Dark Earth

Aero Precision Complete Upper Receiver M4E1-T 14.5in 5.56 Carbine Length Barrel 12in M-LOK ATLAS S-ONE Handguard Anodized Black

Ar-15/M16 5.56 Pencil Barrels - Duty 5.56x45 Nato 16'''' 1-8 Twist Pencil Contour Bbl Fde

Ar-15 Upper Receiver Assembled No Auto Sear Cut - 5.56mm Assembled Upper Rcvr No Auto Sear Cut For Ar-15 Black

Luth-AR A1 Slick Side Retro Complete AR-15 Upper Receiver - 5.56 - 20" - OD Green

Luth-AR A1 Slick Side Retro Complete AR-15 Upper Receiver - 5.56 - 20"

SEEKINS IRMT-R BILLET UPPER BLK

Faxon AR-15 Duty Series SOCOM Upper Receiver Assembly 5.56x45mm NATO 10.5" Barrel

Faxon AR-15 Duty Series SOCOM Upper Receiver Assembly 5.56x45mm NATO 10.5" Barrel Suppressor Ready

Vktr Indrustries VK-1, 5.56mm, 11.5 Barrel w/ A2 Flash Hider, Black, Complete Upper Receiver

CMMG Dissent Upper Group Mk4 5.56mm 16.1" Anodized Blk

Dirty Bird 14.5 Pin & Weld Government V2 5.56 M-LOK CA Compliant Complete Upper - Black

Dirty Bird 20" M16A2 Enhanced 5.56 Retro Upper Assembly - Chome-Lined