Just finished my send build, a 300 Blackout. Oh my damn this is addictive!!!! I will be hand loading all of my own rounds for this one. Already have a new turret for my Lee Loadmaster topped off with a set of dies for 300 AAC. I have all of the other tools, jigs and trimmer to convert .223 brass to Blackout. Just finished this build and I have already started ordering parts for my next build. Well here are the specs on this one: 16" Surplus Ammo H-Bar profile barrel Stag Lower that I laser engraved the second amendment on PSA lower parts kit YHM extended takedown pins Rock River safety selector American Trigger Corporation AR-Gold Trigger JP Enterprises silent captured spring Rainer Arms Raptor Charging handle Full auto BCG YHM flip up Backup sights Nikon p300 300BLK scope mounted on a Burris P.E.P.R. Mount Magpul MOE grip and forward grip Magpul UBR Rear stock.