The SB-X barrel provides the versatility of a short barreled rifle (SBR) without the burden of red tape paperwork. The SB-X barrel allows the addition of a suppressor without drastically increasing the overall length of your firearm. The barrel length of 12.375" would be considered an SBR if not for the shroud which brings the overall length to 16.625". This barrel avoids cumbersome paperwork and provides a shorter, light-weight solution for those who love shooting suppressed. With the standard threaded end, attaching a suppressor is easier than tying your shoe. Notes: Includes fake suppressor.