Smith & Wesson M&P 45 CO2-powered Semiauto 8-shot rotary pellet clip & 8-shot rotary BB clip Shoots pellets or steel BBs Double- and single-action* Fixed front sight Rear sight adjustable for windage Integral accessory rail Synthetic frame Textured grip Manual safety *You can pull back the rear part of the slide to shoot the gun single-action, however Umarex lists this gun as double-action only. The manufacturer states that the M&P 45's velocity is 370 fps. A recent velocity test showed that BBs delivered 360 fps and pellets 350 fps. The owner's manual says the gun is 7.10" long. That's a typo. It's really 8.10" long.