airsoft hop up problem (HELP!)

[Ranger007]

hey guys, i just recently got an angel customs tight bore barrel in the mail for my tm p90 and i went to install it and i'm pretty sure id did everything right but when i went to shoot it, the bb dropped about 25-30 feet so then i thought i might just need to adjust the hop up. so i did and there was no difference or at least very little difference. and then when i shot it on full auto bbs went off in every direction.
at that point i thought that the tight bore actually did the opposite of what it was supposed to do and gave it shorter range and less accuracy. so i decided to put the old barrel back in but that didn't make any difference. so i think its a problem with the hop up unit but idk, what do you guys think?

(there is a game coming up this weekend i want to go to so i need to fix this soon!)

[Fluffy Boy 32]

Check to make sure your hop up rubber didn't fold over when you were putting everything back together. Also, check to make sure your hop up nub is positioned correctly. Check those because that's what it sounds like is giving you the problem...

[Ranger007]

[Ranger007]

i don't know for sure nut to be it seems my hop up nub isn't going down all the way.

[vulrath]

I've run my own P90 without a nub since shortly after I got it (remove the hop arm, pull out the nub, put the arm back in, and set the hop a bit heavier than you would normally). Accuracy is scary with a stock-length Madbull 6.03mm barrel and 0.25g's (well, I'm sure the couple of upgrades I did internally certainly didn't hurt either). I've been contemplating a ProWin CNC hop up chamber for a while now, as my stock unit has seen better days.

That said, I'd check the bucking for tears while you have the hop up apart, namely around the little bump where the nub/hop arm hits and around the back edge to see if it's chewed up.

[Ranger007]

[cowboy117]

[Slade]

Make sure you don't put the adjustment dial on backwards, that's what I did when I upgraded mine to a tightbore.

Of course having a nib helps too.

[NOWWHATSUCCER?]

Did you put the barrel in up-side down? I did that once and I had the same problem.