I just traded my stock trigger springs out on my RRA A4 for a set of lighter wolf springs. I take it out back and test fire it. Bang. Next shot, nothing. I had to reset the safety to get it to fire again. Done so for te next 4 shots. Take back inside, take apart, check everything. All seems good. Take back outside, same thing. Put stock springs back, good to go!! WTF!!!!!! Any ideas? I must add that the rifle is set up with a stage 2 target trigger.