223 Remington Upper Receivers

Wilson Combat AR-15 Receiver Set Anodized Black

Radian Weapons Model 1 Builder Kit OD Green 5.56 14 MLOK Handguard

CMMG Resolute Mk4 AR-15 Complete Upper Receiver 5.56x45mm NATO 16" Barrel

Luth-AR AR-15 Lightweight Upper Receiver 5.56 NATO 16 Barrel

LANTAC Raven Billet Side Charger AR-15 Receiver Set Black

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

Noveske AR-15 Chainsaw Complete Upper Receiver 5.56x45mm NATO 10.5" Barrel NSR-9 M-LOK Handguard Black

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

Luth-Ar Rifle Kit Bull 20 With Fixed Stock AR Build 223 Rem 1 9 Twist

Luth-Ar Rifle Kit Bull 16 W Fixed Stock 16 In Fluted Barrel Upper Handguard

AERO PRECISION M4E1-T-NO FA-Comp. Upper, 16" 5.56 Mid, RM15

Luth-Ar Rifle Kit Bull 20 W Adj Stock AR Upper and Lower Parts Kit

Sons of Liberty Gun Works Broadsword Upper Receiver .223 Wylde 14.5 P&W Barrel

Sons of Liberty Gun Works Broadsword Upper Receiver .223 Wylde 16 P&W Barrel

RISE BK-160 16 300BLK

Cobalt Kinetics CK-Pro Urg Complete Upper Flat Dark Earth 5.56 / .223 Rem 11.5 Barrel

Grey Ghost Precision AR-15 Builders Kit Sniper Grey Multi-Cal

FightLite Industries DFX Complete Upper 5.56 / .223 Rem 12.5 Threaded Barrel w/ 100 M27 Links

Noveske Gen 3 Receiver Set Flat Dark Earth 5.56 / .223 Rem

Aero Precision Complete Upper Receiver M4E1-T .223 16in Wylde Fluted Barrel 15in M-LOK ATLAS S-ONE Handguard Anodized Black

Luth-ar Lo-Drag Classic Bull Complete Upper 5.56 / .223 Rem 16 Threaded Barrel

American Tactical Omni Hybrid Battle Field Green 5.56 7.5 Barrel 30-Rounds w/ Duo Sight

American Tactical MilSport Complete Upper 5.56 / .223 Rem 7.5 Threaded Barrel

Guntec USA AR-15 Stripped Billet Upper Receiver Flat Dark Earth