- Standard main spring for break-barrel air rifles Hatsan 125, 130, 150, and 155. Delivers power output up to 17 J, fully compliant with Polish regulations, across all calibers available for these models: 4.5 mm (.177), 5.5 mm (.22), and 6.35 mm (.25).

Standard main spring for break-barrel air rifles by Hatsan Arms. Designed to deliver power output compliant with Polish regulations (up to 17 J). Compatible with Hatsan models 125, 130, 135, 150, and 155 in the following calibers: .177 (4.5 mm), .22 (5.5 mm), and .25 (6.35 mm).
The spring restores the rifle’s power output to a legal limit of 17 J (regardless of the caliber supported by a given model). Also suitable for Hatsan clones, including Ranger air rifles.
Developed by Sharg®, the exclusive importer of Hatsan products.