I know Rob already has plenty of good references, but here's another one just because I was so pleased with his service. Ordered a couple of followers and a recoil spring assembly on Wednesday afternoon, and my stuff came in the mail on Saturday. Pleasure to deal with, good prices, good communications. Couldn't ask for more. He sells his stuff on Ebay and Gunbroker. He also stocks more than he has up for auction, so email him if you don't see what you need.