$450 OBO comes with barrel, gas block and tube, handguard and barrel nut. Everything is in like new condition (less than 100 rounds through it), also willing to throw in attached dual-lok mini flash hider if wanted for an additional $50, and/or assembled on the Griffin Armament MK1 upper for an additional $75. If interested in the dual-lok mounting system, I have a custom shortened compatible blast shield for it that I can part with, depending on the deal we agree to. Let me know if you are interested it is a blast (literally). Photo