Evike.com features the A-CAP Combat Adaptive CO2 Pistol from APS-Concept... "The Combat Adaptive Pistol or CAP is the newest CO2 powered sidearm offering from APS. The CAP features an ergonomically molded polymer frame, with lightly textured grip panels, providing a comfortable and effective non-slip grip. At the business end of the frame is a 4-slot 20mm accessory rail, perfect for mounting weapon lights or lasers making it an effective weapon platform for both day or night operations.