Viridian WP22-OD Green Laser Sights Built for Walther P22 OD Green and PK380 with Holster Gun-specific, WP22 mountable Viridian Green Laser with battery and custom fit Kydex holster Mounts flawlessly on Olive Drab Walther P22 and Walther PK380 handguns with a self-lock system Up to 100 yards of visibility in broad day light and two miles of visibility at night SmartLaser technology with four operating modes; ambidextrous operation Weighs only 2.7 ounces including battery--constructed of high strength Zytel polymer