Manufacturer: Modify
Type: M170
Compatibility: Modify MOD24 Bolt Action Rifle, APS-2 and SSG24
Material: High-grade piano wire
Comments: The Modify irregular-pitch spring is designed to change the FPS of the rifle being upgraded. If you install M170 or M190 spring, we suggest that you buy the Reinforced Spring Guide Stopper together for best performance.
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