I just bought a fail zero bolt and carrier for my AR build. I found this site www.outdoorgearbarn.com and it was the cheapest place I could find the bolt, I got it for 199.95 and only 7.95 flat shipping. Also picked up 8 pmags for 12.29 a piece and they where also covered under the 7.95 flat shipping. They had a lot of good deals and quite a few things I've been trying to find for my winchester 1300 that I can't find in town. I talked to a sales lady there at the store in Arizona and she was very helpful and answered some technical questions I had. For what its worth I would really recommend this sight and the folks there seem very knowledgable.