Atlas Gunworks 9mm 4.6 Recoil Springs Tune Pack

Kit includes five 4.6" AGW color-coded premium recoil springs7lb. white recoil spring8lb. green recoil spring9lb. blue recoil spring10lb. red recoil spring11lb. yellow recoil springAtlas Gunworks 4.6" Spring Compatibility:HyperionAthenaChaos Precut for our 4.6" PistolsLimited 9mm (Minor PF): Replace every 10k rounds*Open 9mm/38SC (Major PF): Replace every 5k rounds*We recommend testing every new spring prior to installation to record exact spring weight/pressure. Spring weights will vary to a degree and it's always good to have extras on hand.It is critical with every recoil change to check the new spring to ensure there is not coil bind.