So I'm saving up for my first AR. I have a lot of experience firing .308 and already have a small stash of .308/7.62 piled up. I've fired a buddy of mine's .223 and I feel comfortable bumping to a .308. I've looked at the dpms REPR and love the hell out of how it looks but have yet to find one to heft and fondle. Also, is that beast available already set up left handed or am I going to have to get it customized by a gunsmith? Lastly would I be better off to just work with my local gunshop and smith to custom build one?