Upgrade your air gun with this nitrogen-filled70 Kg gas ram spring for magnum powered air guns. This piston has a stroke length of 100mm (4inches) and total length of 250mm (10 in) and 19mm (3/4in) diameter. Some advantages of a gas spring are: smoother cocking effort, quieter shots, increased shot to shot consistency, and the ability to leave your air gun loaded for hours without spring fatigue. Replacement or upgrade of airgun spring should only be done by a competent individual
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