Individual weights for the Stealth Recoil Spring, if you already have the Stealth recoil and would like to change the weight to better suit your configuration. You can buy individual weights with the bumpers and swap them out yourself.The weight on the 308 and Big Bore version can not be changed.Weight Type: SRS-9 (5.1oz) Weight + Bumper, SRS-C (2.8oz) Weight + Bumper, SRS-H1 (3.8oz) Weight + Bumper, SRS-H2 (4.6oz) Weight + Bumper, SRS-H3 (5.4oz)Weight + Bumper