Part 1 of this series described the path the AR-15 took to become a viable longer-range rifle. In Part 2, Glen Zediker gets into the details of ammunition and gun accessories to make the 500+ yard AR a reality.
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The AR-15’s bolt and carrier are the heart of the rifle, so knowing the ins and outs of the bolt carrier — weight, platings and coatings, firing-pin hole size, and bolt choices — can make your AR run more smoothly and reliably. Read this post to discover how to keep your AR-15 working properly with the right bolt carrier assembly, firing pin holes and firing-pin retainers.