300BlkTalk

Thank you all so far for the feedback. I appreciate you debunking some of the crap info I gathered up. I've learned a lot just in the past few days. I think I'll be going with the 7.5" barrel initially and getting something like the Noveske Flash Hider KX3 Pig. After that I can build a 5.56 upp...

A few questions from a newb... If I build a 300 Blackout AR-15 pistol can I safely shoot .223 and 5.56 with a simple barrel change or do I need an entirely separate .223/5.56 upper? I realize that this next question depends on your application/requirements. My main requirement is to be accurate out ...