RAIL AKS74U UPPER HAND GUARD PDW HAND GUARD B4 RAS 5" B4 RAS 7" B4 RAS 9" B4 RAS 12" B4 RIS 7" B4 RIS 12" COBRA 14.5" DEVGRU 9" DEVGRULTD 9" KEYMOD 12" MK18 9"Daniel Defense LICENSED MK18 12"Daniel Defense LICENSED REBEL 7" URX 2 9" URX 3.1 9"