Recoil Calibration Pak FEG PA-63

Caliber 9mmMakarov/9x18, Pistol FEG (FEGARMY Arms of Hungary) Model PA-63 fits not Caliber .380ACP/9x18 and/or Makarov Pistols, Recoil Calibration Spring Pak 6piece, include 3/three recoil springs with each 1/one 11lbs STD-Factory Standard, 13lbs XP-Extra Power, 15lbs XP-Extra Power and 3/three firing pin Spring XP-Extra Power, Code 13210 Wolff Gunsprings USA. Professional installation recommended!Start with the highest load rating and work down until the desired slide operation is obtained!