I stated in an earlier thread i didn't need anymore rifles, then Aero Precision came out with builder's kit in Noveske Bazooka Green, upper/lower/rail. I couldn't resist, got it today, it's not rocket launcher green but more of a parkerized look. Now I have to build something on an AR15 platform, i will not even consider a 300 black out. i have 6.8's, 556's, x39's. i'm thinking an 18" 556, or maybe the Noz24 when it's available. any suggestions?