I picked up my PSA 9mm lower yesterday. This will be my first AR but I'm thinking I my do another at some point. I will most likely go ahead and set up a 7.62x39 AR since I want to avoid .223 and I don't want to add any more calibers to what I have already. This PSA lower seems to be pretty nice and well built so I'm thinking I may get just another PSA complete lower after I get the upper for this one. I already purchased some 20 round 9mm AR mags and I'll probably get a few 32 round mags whenever they show up back in stock.