Don't even try it. I own plenty of airsoft. You wouldn't be able to get a real barrel to fit without extensive modifications, not to mention trying to stuff the striker assembly into the weapon in place of the spring piston. I own a spring-powered airsoft Glock 19 myself that I have taken apart and done trigger work on (lightening the sear spring and polishing the trigger arm). You can't convert one of these into a real gun without an extreme amount of work, nor would it be safe at all. You'd have a KB. Not to mention you'd have to buy a real Glock slide, because plastic slides are not made for this at all and you can't put an extractor on an airsoft slide (LOL). Oh, and I don't know about the Glock, but the spring and gas 1911's I have will NOT accept real 1911 mags and probably never will no matter what you do to it. Trying to machine it to accept a real mag will probably just ruin the frame. IBTL, and hopefully I've given enough of a listing of why you can't/shouldn't do this. Not to mention there's enough goons out there who follow the "if it looks like a gun, it's a gun" mentality and want to ban airsoft. Don't give the anti's any ammo, I like my airsoft just like I like all other guns.