The Grip-Activated Arma Laser fits the Beretta PX4 Storm Sub Compact and the holster fits the pistol with the laser attached. The GTO is a marvel of modern micro-electronics. The ArmaLaser GTO is a human touch activated laser system. The GTO is short enough to fit on any pistol with a Picatinny Rail, Sub-compacts, compacts and full-sized pistols. Just wlide the GTO onto your rail, screw down the locking screw and you are ready to go. Featuring True Touch Activation, which on the GTO works like a toggle-switch, just all electronically. Extend your finger and touch the silver plated wing tip on either side (ambidextrious) to turn the laser on. Touch it again to turn off. Very simple, streamlined and easy. Its virtually impossible not to touch the strip when you extend your finger and tap the side of the pistol. There is no fumbling around for an awkward switch. You can also install the optional flex strip which allows grip activation by touching the contacts where the grip meets the triggerguard. Your GTO is ready when you are. It Features a very bright next-generation 635nm 4.5mW laser module which is fully adjustable for both windage and elevation and STAYS adjusted no matter how many rounds you fire. Arma Lasers are are Class 3R with a peak power output less than 5mW and are registered with the FDA as a laser manufacturer. It's incredibly strong and sturdy with incredible abuse-absorbing rigidity. Requires no tools, pin removal, or gunsmithing. Installs easily in minutes and is simple to adjust to point of aim. The laser can also switch between a steady laser beam mode and pulsing beam mode. (*Please note: only the laser sight, holster and batteries are being sold - NOT the firearm. We are not a firearms dealer.)