- Standard main spring by Hatsan for MOD 70 airguns. It allows to obtain 17J energy, in accordance with Polish law, in every available caliber for a given model: 4.5 mm, 5.5 mm, 6.35 mm. Suitable for Hatsan clones, incl. Ranger carbines.

Standard main spring for Hatsan Arms airguns. It enables energy to be obtained in accordance with Polish law (17 J). Designed for rifles with an extended compression chamber: MOD 70 in calibers: cal. .177 (4.5 mm), in. .22 (5.5 mm) and in. .25 (6.35 mm).
The spring restores the energy of a spring airgun in accordance with the Polish law - 17 J (in each available caliber for a given model). Suitable for Hatsan airguns clones, incl. Ranger carbines.
- SPR-ST MOD 55-45 - air rifle cal. 177 (4.5 mm)
- SPR-ST MOD 55-55 - air rifle cal. 22 (5.5 mm)
- SPR-ST MOD 55-63 - air rifle cal. 25 (6.35 mm)
Created by: Sharg® Company - exclusive importer of Hatsan