I just bought this thing brand new about a month ago, I took it to the range today to fire it for the first time and it wouldn't fire. The firing pin didn't seem like it was hitting the primer hard enough...I tried several different rounds and got the same result. The pin was hardly making a mark on the primer compared to other guns I have and a couple times the trigger wouldnt even pull I removed the upper and the buffer spring flung out and saw that the buffer retainer pin was laying in the trigger mechanism all mangled up and the retainer spring was nowhere to be found. I must have been dumb and lost it when I installed the single point sling mount but didnt realize it. My question is ( and this may sound dumb), would this cause the problem I was having with this thing not firing, I ordered a new retainer and spring for it but I'm still bummed about it not firing and want to know I don't have any other problems