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This item is out of stock

 The CO2 VALVE STEM has a sharp pin on the front end that pierces the 12 gram CO2 cartridge on the first shot. It's original to all 1740, 2240, 2250B, 1760, 2260 and Crosman Custom Shop CO2 models.

 The DISCOVERY & CHALLENGER VALVE STEM is commonly used for bulk-fill, HPA and PCP conversions on 2240, 2250, 2260 and Crosman Custom Shop models.

 The MARUADER VALVE STEM is original to Marauder rifles and pistols, 1701P and 1720T. It also makes an excellent upgrade for Maximus if modified to operate at higher pressures. 

 The 13XX VALVE STEM is the current version for all modern 1377, 1322, 2289G Backpacker, PC77 and 1300KT models. It's a direct replacement for older models also. It's the same stem used for Maximus, 760, M4-177 and similar variable-pump models.