Are you wanting to convert to .22 or keep it .177?For .22 you can get a steel breech (p/n 1377-074) and 24" barrel (p/n 2260-003) from Crosman. As far as power upgrades, there are flat top pistons available and even some members here that can possibly do the upgrade for you.Happy Shooting!!!!Dave
It's my friends gun so I'll have to ask him what he want's done to it.