08-20-2011, 04:06 PM
For any rifle, it's a good idea to have as many spare parts on-hand as possible. For AR's in general, that means at least an extra bolt, gas rings, all your springs, pins, and small parts. There are several kits available through Brownell's and Midway to address these demands. Buy a parts box with all the segments in it, and stock it well. Extractor, extractor spring, extractor buffer, extractor pin, ejector, ejector spring, ejector roll pin, firing pin, firing pin retaining pin are the main spares I have always kept on-hand. You can even stow many of them in a Magpul grip on the rifle/carbine.