BB Dribble

[Double Tapper]

I have noticed sometimes that when firing my hfc m190,it
cycles but the BB rolls out,now once in awhile,some BB's
will fall out when not firing,but 98% of the time they stay
put.I have tried cold,warm and hot mags,all produce the
same results.I know I am filling them right.

[WhatTheWho]

I would assume your hop-up is turned off or is on a low setting. Typically the hop-up assembly is the only thing holding the chambered BB, so lack of resistance from the hop-up could just let your BB roll down the barrel.

[Double Tapper]

But what about when I fire the gun and they roll out,one shot
after the other?.

[CDN_Stalker]

Most likely the same thing as the reply above. The burst of air is pushing a rolling BB(s) along through the barrel.

[Double Tapper]

Ok thanks,I misunderstood him.

[mateba]

you might need to replace the hopup sleeve. Check it out. How is the amount of air coming out when it misfires? Does the kick feel the same?

[Double Tapper]

It is a fixed hop up,a little rubber bump,do you replace the barrel to
fix this style of hop up?.I would like to get a high end barrel on this gun.

[CDN_Stalker]

If fixed hop up, your rubber is torn, period.