The world of the military M16 and, by extension, the civilian AR-15 market, has become dominated ... with its AR-15A2 “H-BAR.” While heavy barrels have the potential for amazing accuracy ...

AR-15-style pistols have much shorter barrels than typical rifles. For example, Ruger’s AR-556 pistol models have barrels between 9.5 and 10.5 inches, or about half-a-foot shorter than its rifle ...