223 Remington Upper Receivers

Dirty Bird 16" Govt Mid 556 M-LOK AR-15 Complete Upper Assembly - OD Green

Dirty Bird 16" Govt Mid 556 M-LOK AR-15 Complete Upper Assembly - Midnight Bronze

Dirty Bird 16" Govt Mid 556 M-LOK AR-15 Complete Upper Assembly - FDE

Dirty Bird 16" Govt Mid 556 M-LOK AR-15 Complete Upper Assembly - Black

Ambidextrous Side Charging Flat Top AR 15 Upper Receiver

Dirty Bird 16" Govt Mid 556 M-LOK Complete Upper - FDE

Lantac AR-15 Raven Billet Builder Set - 10.5"

Aero Precision M4E1 Enhanced Upper Receiver and M-LOK Handguard Combo Gen 2 - Anodized Black - 15"

Cross Machine Tool UPUR-1LH Billet Left Handed AR-15 Upper Receiver

Cross Machine Tool UPUR-4 Billet AR-15 Upper Receiver - Slick Side

Stag Arms 16" 15 L Tactical M-LOK/Quad Rail Midlength Left-Handed Upper Assembly - CA Compliant

Stag Arms 16" 15 L Tactical M-LOK Midlength Left-Handed Complete Upper-CA Compliant

HM Defense HM15 Billet Lower and Upper Set Black HM15LU-Set

Ghost Firearms Upper Receiver Pistol Lower Parts Kit 5.56mm/.223 10.5in Carbine Moly Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard A2 Flash Hider

Ar-15 Qrb 2 Pin Upper Receiver Takedown Kit - Qrb 2 Pin Upper Receiver Takedown Kit Rifle Gas Tube

Bravo Company 610-890-ELW RECCE-11 KMR-A 11.5\" 1:7 .223 / 5.56

Battle Arms Development BATTLE ARMS AUTHORITY ELITE BILLET Lightweight AR-15 Receiver Set, 7075-T6 Aluminum, Ambi.

Armalite SPR Mod 1 .223 Rifle 15SPR1CB

Aero Precision M4E1 Builder Set w/ 10.3" ATLAS R-ONE M-LOK Handguard - Gunmetal Grain

Aero Precision M4E1 Builder Set w/ 9.3" ATLAS S-ONE M-LOK Handguard - Chocolate Chip Camo

Aero Precision M4E1 Builder Set w/ 9.3" Enhanced M-LOK Handguard - MTC Dark Camo

Aero Precision M4E1 Builder Set w/ Enhanced M-LOK Handguard - OD Snakeskin - 10.7"

M4e1 Superlative Arms Piston Complete Upper Receiver Groups - Piston Upper 16in Barrel 15in Handguard Black

M4e1 Superlative Arms Piston Complete Upper Receiver Groups - Piston Upper 14.5in Barrel 12in Handguard Black