KAC-Knight's Armament SR-15 Standard Weight Carbine Buffer (20387)
Standard weight carbine buffer from Knight's Armament, same as used in their 16" 5.56mm guns (click here) and SR-15 lower receivers (click here).
Standard weight carbine buffer from Knight's Armament, same as used in their 16" 5.56mm guns (click here) and SR-15 lower receivers (click here).