5.56x45mm NATO Upper Receivers

APF Armory AR-15 Pistol 2.0 Complete Upper Receiver 5.56x45mm NATO 10.5" Barrel 9" M-LOK Handguard

Sons of Liberty Gun Works M4-89 5.56 AR-15 Upper - 13.7"

SOLGW M4-89 10.5" 5.56 URG

SOLGW PATROL SL 13.7" 5.56 FSB URG

East India 5.56x45 Assembled Upper Receiver Starter Kit For Ar15 - East India 5.56x45 Assembled Upper Medium 13.7'''' Bbl W/Rail

BEAR CREEK ARSENAL 5.56 NATO COMPLETE UPPER 16" BRL 1:7 TWIST MID-LENGTH GAS MLOK W/ BCG & CHARGING

BEAR CREEK ARSENAL 5.56 NATO COMPLETE UPPER 10." BRL 1:7 TWIST CARBINE LENGTH GAS MLOK

Rainier Arms Ruc Pro Mk2 5.56 Nato Partial Upper Receiver Black 12 in

Rainier Arms Ruc Pro Mk2 5.56 Nato Partial Upper Receiver Black 11.5 in

Rainier Arms RUC DI 5.56 NATO Complete Upper 16in Black Medium

LEAD & STEEL All-Rounder Carbine Upper Receiver 5.56 13.9" FDE

LEAD & STEEL All-Rounder Carbine Upper Receiver 5.56 13.9" ODG

LEAD & STEEL Just As Good Upper 5.56mm 18" Gray

LEAD & STEEL Just As Good Upper 5.56mm 18" FDE

LEAD & STEEL Just As Good Upper 5.56mm 18" ODG

LEAD & STEEL ARC Mil-Spec Stripped Upper Gray

LEAD & STEEL Just As Good Upper 5.56mm 16" ODG

PRI Mark 12 Mod H AR-15 Complete Upper Receiver 5.56x45mm NATO 16" Barrel 1:7" Twist Flat Dark Earth

AR-STONER AR-15 Classic Complete Upper Receiver Assembly 5.56x45mm NATO 16" Barrel

AR-STONER T-Series AR-15 Unassembled Rifle Upper Receiver Kit 16" Barrel 5.56x45mm NATO

AR-STONER T-Series AR-15 Unassembled Pistol Upper Receiver Kit 5" Barrel 5.56x45mm NATO

AR-STONER T-Series AR-15 Unassembled Pistol Upper Receiver Kit 7" Barrel 5.56x45mm NATO

AR-STONER AR-15 Pistol Kit 5" Barrel 5.56x45mm NATO Standard Buffer System

AR-STONER T-Series AR-15 Complete Upper Receiver 5.56x45mm NATO 14.5" Barrel