Well, just about any KWA Glock can use the 50 round magazines, so thats nothing fancy. Full auto isn't that great, especially on the 18Cs. They tend to break down, and after a while, it will only fire full auto. The best out of the box Glock I have experience with(besides my real one!) is my Glock 34. 330 FPS with a .25, and has the range of a stock AEG.