WHAT DOES AR-15 MEAN?

I like the storm, I have both the complete measurement LE product plus the compact size and as soon as owned the Sub at the same time. Owning owned and shot all3 Beretta PX4 Storm models I would not carry a Storm Sub .40 S&W because the revolutionary piece of the PX4 Storm may be the rotating barrel mechanism which lessens felt recoil and boosts ac