AR-AK-SMG

Sig Sauer

Sig Sauer R516G3556N16B 516 G3 Mohawk 5.56 NATO Semi-Auto Rifle with 16-Inch Barrel and Black Finish

Heckler and Koch (HK USA)

Heckler & Koch MR556A4 URK Upper Kit 5.56mm with M-Lok Handguard

Heckler and Koch (HK USA)

Heckler & Koch MR764A4 URK 7.62mm 13-inch Upper Receiver Kit

Radian Weapons

Radian Weapons Model 1 Upper Receiver in 223 Wylde – 14.5 inch Black Finish

Heckler and Koch (HK USA)

Heckler & Koch MR556A4 Upper Kit 5.56mm with M-Lok Handguard - Matte Black

Radian Weapons

Radian Weapons Model 1 Upper Receiver in 223 Wylde with Black Finish

Radian Weapons

Radian Weapons Model 1 Upper Receiver in 223 Wylde with Radian Grey Finish R0471

Radian Weapons

Radian Weapons Model 1 Upper Receiver for 300 AAC Blackout - 9 inch Black Finish

Radian Weapons

Radian Weapons Model 1 Upper Receiver in Flat Dark Earth - 14.5 Inch .223 Wylde

Radian Weapons

Radian Weapons Model 1 Upper Receiver in 223 Wylde with Radian Grey Finish

Radian Weapons

Radian Weapons Model 1 Upper Receiver for 223 Wylde - 10.5 Inch Black Finish

Heckler and Koch (HK USA)

Heckler and Koch MR764A4 URK 7.62mm 16-Inch Upper Kit