The NOVRITSCH SSP1 is a pre-upgraded, hard-kicking Gas Blow Back Pistol which can be used with both CO2 and Gas. It is an out of the box solution and doesn’t need any further modification or tuning. SKU-P1B1R Features - Extremely durable internals. - Designed to shoot heavy BBs. - Supreme accuracy. - Can handle CO2 and strong gas without any issues. - High Capacity Magazine – can hold 31 BBs. - Threaded barrel for suppressors/tracer units. - Rail for pistol flashlights. - Enlarged & improved slide release. - Extended beavertail and grip safety. - Comes in a gun case with a valve tool. - Extensive  with courses and guides. - Designed by passionate Airsoft players in Vienna, Austria. - Vienna-based Tech support team. Weight: 665g / 1.4lb (without Magazine). The only difference between CO2 and Gas versions is the magazine.