So, I've got a bushmaster ar with an 18" barrel. I was wanting something with a little more oomph, but in an ar-15 size receiver. So, I was thinking about re-barreling it with a 6.5 Grendel barrel. Here's the question. Will an 18" aa lite barrel reach 1k? I was wanting to keep it pretty compact cause I want to suppress it. What's y'all's thoughts?