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OEM recoil spring weight for a P320 M17 Bravo

14K views 9 replies 3 participants last post by  DirectDrive  
Interesting ....the Grey Guns fat rod, stainless steel kit for my 320 X5 came with a 13# spring. It runs great with all ammo. Wonder how they determine what weight goes with which gun? I know the X5 is a little longer slide so just a tad heavier than the regular 320 full size but then it does have the cut outs so maybe about the same ....??...:confused: