Warren,
Many of these laws are thought up on emotion which never is a good thing.

In my state,a Ruger Mini-14 with the standard stock is OK,but put a folding stock on it and it is banned,a big no-no.

Getting back to the Glock subject,they were first introduced and folks thought that they were designed to be smuggled onto airlines.

Actually there is more steel in them than many standard handguns and Gaston Glock had put some metal in the polymer just be sure that they would not be "invisible" to metal detectors.

Wayne