Knights Armament SR15 Mod 16inch complete upper receiver assembly with front and rear knights sights, URX4 keymod handguard and correct heavy buffer included as well is the newest flashider from Knights.
UPC Code: 819064014379
Manufacturer: Knights Armament Company
Barrel Length: 16"
Accessories: URX 4
Description: Upper Receiver Assembly E3 Mod 2
Manufacturer Part #: 31296