[echo2]

I had purchased a bore up nozzel for my M4 as an upgarde. I've noticed that the bbs are not firingconsistently. I can see bb's shooting far and some are just dropping off the barrel. I put back the old nozzel and it works fine. Ive noticed that the bore up nozzel are a bit longer than the regular one. Did i got a wrong nozzel or this is how a bore up is. If i use bore up should i change something in the hop up or feeding area> seems the feeding was off due to the sixe of the nozzel... please helppppp...