Hey everyone, I've been on G&G for several years now but hadn't really been on this portion of the forum due to not owning an AR but that has recently changed. I bought in the last month or so a Lead Star Arms Barrage with a 17" mlok handguard. I love it! I am, however thinking of buying an upper for it in .300 BLK and am planning on something that would put it into SBR territory and I am not sure what i would have to go through to enable myself to have that option. Has anyone here done anything along this line? Thanks in advance.