Gun Digest Book of the AR-15, Volume 4

You wouldn''t do this to your AR, but Sweeney did it here!

With manufacturers branching out into nontraditional calibers, and continual advances in optics, ammo and associated gear for the AR-15, Gun Digest Book of The AR-15, Volume IV brings you up-to-date on the latest developments in the AR industry, including chapters on:

• .223 vs. 5.56: What''s the problem?
• Various .300s of the smaller-than-.3...