AR15. Site is pretty much the only place I will go to for Polymer 80 stuff. There is just something about their p80 lower parts kits that seem easier to assemble than the ones I have bought from other websites. I bought a p80 for my brother from AR15. Site for his birthday, and it was almost last minute, but their shipping department is QUICK. It was delivered on the 3rd day of ordering, and I don't know if I should thank USPS or AR15. Site or both for getting that out to me so quickly. My brother liked his p80, and said I should get one for myself. I honestly thought it looked pretty good too so I got one with the FDE slide and frame, and have been hooked ever since. Give these guys a try.