I have a pistol that i bought from a neighbor. It probably has 2,000 rounds put through it. It is still tight and fires well, but I know it will wear out sooner later. Given the difficulty of buying a new one (and it aint gonna get easier) what parts should I buy now to rebuild it in the future? Does my thinking make sense? Sure, it might be cheaper to buy a new pistol, but that may not be an option.