The American Tactical® Inc. GSG Firefly Rimfire Semi-Auto Pistol is a scaled-down version of a classic P-series SIG, chambered in 22LR. There's a slide-mounted thumb safety and a right-handed functional decocker. The DA/SA trigger makes for a nice training pistol utilizing cheaper rimfire ammunition. The zinc alloy frame is very durable. The Firefly's frame has an integral Picatinny accessory rail and features polymer grip panels. Scaled down P-series in 22 LR Adjustable rear sight Slide-mounted thumb safety Decocker DA/SA Zinc frame Integral Picatinny rail