I am looking for 1 of my last 2 parts to finish this build, I want a barrel, would like to have a 24" fluted barrel with threaded end so I could put flash suppressor or compensator , or just a band to protect the threads.. Would settle for a nice 20" heavy barrel fluted as long as it is threaded for muzzle device. even a 18' if I have to buy dint want the head aches getting a mid gas system working correctly, plus on the sass have not figured the gas block yet. I really dint want to take barrel to work for threading as it is not a happy place for that,, it only takes a few min to get it done or caught AND fired.. 18" heavy would b nice with long standard gas tube,,does that or is that available?