Hello everyone, I traded a crappy HFC Mac-11 for an HFC M190 that was broken(leaky mag; the guy had no idea how simple it was to fix) and I fixed it up. But, it is the Full-auto model and the Semi-automatic function will not work. I've taken it apart and inspected, cleaned, and lubed it, and noticed nothing of which to be concerned about. By the way, I have experience with GBB's so any help would be greatly appreciated! If you need more details please feel free to let me know. Thanks!