| 摘要 |
A gas spring airgun in which the power system comprises a main cylinder 126 which contains a piston 128 and a hollow dummy piston 136. The piston 128 is a sliding fit within the main cylinder 126 while the dummy piston 136 is fixed relative to the main cylinder 126, and is of considerably small diameter. A collar 127 is located in the space between the dummy piston 136 and the piston 128 and is substantially fixed relative to the piston 128 and slidable relative to the dummy piston 136, when the system is pressurised. |
