I bought an SRS but returned it because it came broken in the mail. Got a SSG10 instead. Here new upgrade parts, plus 3 mags, used only at the range once. Totally good. If you bought an SRS then these are all you need for some decent upgrade / performance Mags x 3 95 Newton Spring 101% bucking x2 Rhop patch Modify flat nub Faceless Mouse Fart air brake FAST HOP Kit HopUp nub for FAST HopUp Thanks!