I've decided to SBR my SCAR 17 because I just purchased a Specwar suppressor and would like to shorten up the rifles length. The Specwar is 24oz. and 9" long, so SBR'ing the rifle seems like a wise move to me. I'm going to need to switch out the flash hider on the factory 13" barrel for the proprietary one from Silencerco. My question is, does anyone know the length of the 13" factory barrel without the flash hider so I can put the correct barrel/rifle length on my form 1.