I have a flat top pistol/SBR upper for sale. Has Olympic Arms FIRSH FF Handguard and B.M.A.S. 3 rail gas block. Has a .750" heavy chromed barrel. BCG/CH NOT included. Has about 100 rds through it. In excellent condition. Very few signs of wear. I will accept postal money orders or personal check (with a few days to clear). All NFA rules apply.