Crosman CO2 Plunger Stem End Cap (fits 1077, 2240, 2250, 2260, 1740 & 1760) This is the end cap ONLY. Most guns also have a steel STEM protruding from the cap. This listing is for the cap ONLY. The Crosman 2240 is the only gun that does NOT have a stem. Fits 1077, 2240, 2250, 2260, 1740 & 1760 (although you may need a STEM, too). Genuine OEM Crosman replacement part.