I've been shooting a g4 Glock now for about 3 or 4 months and I love it.Installed a Ghost Rocket trigger set and polished the trigger,and now the trigger is about 3lbs to 3.5lbs, with the factory spring(With the supplied spring 2.5lbs or so,too light for carry!)Man will this thing shoot!I haven't had any problems at all,either.