5.56x45mm NATO Gun Parts

Sons of Liberty Gun Works M4-L89 Upper Receiver Group 5.56 / .223 Rem 14.5 Threaded Barrel

Bear Creek LR-15 Stripped Lower Multi-Cal

CLOAK INDUSTRIES MFR 56 BELT FED UPPER 5.56 NATO FDE

Die Free Co Dos Boot Extension Black 10 x 3-Pack Carton

Aero Precision M4E1-T RM10.3 Complete Upper 5.56 x 45 12.5inch Government Carbine 1-7 Twist 1/2 x 28 Thread Anodized Black

M4e1 Upper Receivers Complete Threaded 5.56mm - M4e1 5.56 Assembled Upper Govt 18'''' Bbl Rifle Threaded Black

AERO PRECISION M4E1 Complete Upper w/ Threaded 10.5" 5.56 Barrel, ATLAS S-ONE Handguard | Black

Luth-AR Lightweight Barrel 5.56 11.5 Threaded Barrel

Luth-AR Complete AR-15 Build Kit .223 Rem 16 Barrel

Luth-Ar Rifle Kit LW16 with Fixed Stock 16in Upper 15 KeyMod

CMMG Banshee Mk4 Upper Group 5.56x45mm 12.5 Inch Barrel M-LOK Receiver

Geissele AR-15 Super Duty MOD1 Complete Upper Receiver 5.56x45mm 16" Heavy Barrel .750 Gas Block M-LOK Black

SanTan Tactical STT-15 Lite Pillar Upper Receiver

LANTAC SF15 Recon Complete Upper Receiver 223 Wylde 16"

FightLite Mission Configurable Rifle AR-15/M16 5.56x45mm NATO 12.5 inch Upper Receiver Assembly 1-7 Twist 1/2x28 Threads Manganese Phosphate Finish

FightLite Mission Configurable Rifle AR-15 5.56x45mm NATO 12.5inch Upper Receiver Picatinny Rail 1-7 Twist 1/2x28 Anodized Black

Grey Ghost Precision AR-15 Receiver Set Multi-Cal 15 Handguard

Fortis Manufacturing License Gen 2 5.56 NATO / .223 Rem

POF P415 Complete Upper Piston Drivn 5.56x45 16.5" ODG

Patriot Ordnance Factory POf Upper Complete 415 Edge 16 5.56

Aero Precision AR-15 M4E1-T Barreled Upper Receiver 5.56x45mm NATO 16" Barrel Mid-Length Kodiak Brown

Aero Precision M4E1-T SM10.3 5 Complete Upper 5.56 x 45 12.5inch Government Carbine 1-7 Twist 1/2 x 28 Thread Anodized Black

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 S-ONE Handguard Anodized

Aero Precision AR-15 Barreled Upper Receiver 5.56x45mm NATO 10.5" Barrel MOE Carbine Handguard Flat Dark Earth