I took a couple co-workers out to the range tonight for some trigger time. We had a great time aside from the problems I was having problems with my GSG-5 carbine. Every 5-10 rounds it would fail to fire. Sometimes there was a light strike on the primer, sometimes not, but I always had to pull the live round out manually and re-chamber the next round. I figured maybe it was just getting gunked up from the cheap lead ammo, but as I was firing my last magazine I noticed this. What do you guys think?