MAXX 150% Enhanced Heat Treated Recoil spring for KP-17 / KP-18 / KP-13
Strongly recommended for KJ KP-17 , KP-18 , and KP-13 series CO2 pistols
Heat treated and provides approximately 150% force of original recoil spring
Improves recoil force and shortens shooting cycles
Fits all TM type full size G series pistols, including TM, WE, KJ, HFC, VFC, Stark Arms etc.