mate, dont bother doing it yourself, because its not easy at all, one problem is taking the maxigrip scope mount off and putting it back on, you need to alter the internals beyond return to fit the ram in, thing is, if you do it and dont like or you do it and you lose 1.5-2ftlbs (i've heard of three doing that, 2 of which were fitted at a gun smiths) then you cant just whack the spring back in, cos ya've butchered the guides and hat and some other stuff, not sure about other guns, but theobens ram in a lightning/tactical xl is a big job, so much so that some gun smiths wont even do it, hope t