Patrick Sweeney. 286 pages. 8½" x 11". Softbound. A generously illustrated look at the vast array of aftermarket parts and accessories for the AR-15, with plenty of tips and ideas for customizing your rifle. Detailed discussions of barrels, buttstocks, forearms, accessory rails, optics, backup sights, triggers, bolts, slings, flash suppressors, muzzle brakes, and complete lowers. Includes a survey of magazines and ammunition, plus a look at 6.8mm variants and Designated Marksman Rifles.