Rock River Arms A4

Rock River Arms A4 AR-15 Complete Upper Receiver 223 Remington (Wylde) 20" Barrel

Rock River Arms AR-15 Complete Upper Receiver 350 Legend 16" Stainless Barrel

Rock River Arms AR-15 Complete Upper Receiver 450 Bushmaster 16" Stainless Barrel

Rock River Arms AR-15 A4 Complete Upper Receiver 223 Remington (Wylde) 4.5" Chrome Moly Barrel 4.25" M-LOK Handguard Black

Rock River Arms AR-15 A4 Complete Upper Receiver 223 Wylde 20" Stainless Steel Barrel 15" Handguard Black

Rock River Arms AR-15 A4 Complete Upper Receiver 223 Wylde 20" Stainless Steel Barrel 15" Handguard with A2 Front Sight Black

Rock River Arms AR-15 A4 Complete Upper Receiver 223 Remington (Wylde) 20" Chrome Moly Barrel 14" Handguard Black

Rock River Arms LR-308 A4 Complete Upper Receiver 308 Winchester, 7.62x51mm NATO 16" Chrome Moly Barrel 11" M-LOK Handguard Black

Rock River Arms AR-15 Varmint A4 Complete Upper Receiver 223 Wylde 24" Stainless Steel Barrel 20" M-LOK Handguard Black

Rock River Arms AR-15 Varmint A4 Complete Upper Receiver 223 Wylde 20" Stainless Steel Barrel M-LOK Handguard Black

Rock River Arms AR-15 A4 Complete Upper Receiver 9mm Luger 16" Chrome Moly Barrel 6" Handguard Black

Rock River Arms Completed Upper Receiver National Match A4 .223/5.56mm 16 Inch Barrel Competition Profile 1-8 Twist 1/2-28 Thread Free-Float Handguard

Rock River Arms A4 CMP Trainer AR-14 Complete Upper Receiver 22 Long Rifle 20" Barrel

Rock River Arms AR-15 A4 Complete Upper Receiver 450 Bushmaster 20" Chrome Moly Barrel 15" Handguard Black

Rock River Arms AR-15 A4 Complete Upper Receiver 9mm Luger 10.5" Chrome Moly Barrel 6" Handguard Black

Rock River Arms AR-15 A4 Complete Upper Receiver 223 Remington (Wylde) 16" Chrome Moly Barrel M-LOK Handguard Black

Rock River Arms AR-15 A4 Complete Upper Receiver 9MM Luger 7" Chrome Moly Barrel 6" M-LOK Handguard Black

Rock River Arms AR-15 Varmint A4 Complete Upper Receiver 223 Wylde 24" Stainless Steel Barrel 20" Handguard Black

Rock River Arms AR-15 A4 Complete Upper Receiver 22 Long Rifle 20" Stainless Steel Barrel 13" Handguard Black

Rock River Arms AR-15 Complete Upper Receiver 5.56x45mm 10.5" Barrel

Rock River Arms AR-15 Complete Upper Receiver 5.56x45mm 16" Barrel Mid-Length Gas System A2 Front Sight

Rock River Arms AR-15 Complete Upper Receiver 5.56x45mm 20" Barrel A2 Front Sight

Rock River Arms Completed Upper Receiver A4 9MM Luger 4.5 Inch Barrel 1-10 Twist 1/2-36 Thread Free-Float Handguard Vortex Flash Hider Black

Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm 10.5 Inch Barrel 1-7 Twist 1/2-28 Thread Free-Float Handguard A2 Flash Hide Black