This is my first post on the board, though I am familiar with boards, I am a new member to this board. I am buying my first handgun in about 3 weeks. It is a GLOCK 23. I have read a lot about them and from what I hear they are pretty good guns. I was wondering if anyone knew of any web pages or books that inform beginners like myself about the function of the parts to handguns. An example would be: some of the stuff I have read say the GLOCK23 is a under coiled. So a different recoil spring is a common aftermarket purchase. I have no idea what a recoil spring is. Anyone know where I can find information on the function of the parts of handguns or just general, useful, information on them? Thanx.