Thats crazy man I had a dream like that a few nights ago. In my dream the trigger was REALLY heavy, but I did end up getting my weapon to fire. The first time I didn't and somebody else shot the assailant for me. After the shooting I looked at my magazine (glock) to see if my weapon fired and all 15 rounds were still there. I was like 'whoa". Then the next group that attacked even though the trigger was REAL heavy I got it to go bang. It was kind of a fun dream, I got attacked by looters with AK pistols and kicked their asses with a little movement, use of cover, and my glock 19. Haha.
The cool thing in my dream was how cool I was thinking under-fire, manuevering to flank our opponenets cause the person with me was pinned down. Everything was perfect except for the trigger thing, I focused on the front sight post and everything. haha