Hey, Skladin, mine has similar problems, but sometimes it can fire up to 4 full mags.

I guess for the first fill, it's always a bit weird, and then, it's working fine after.

hey thanks for the advises.

anyways I'm in the middle of looking for a adjustable hop up unit for this thing.

its really hard to find

anyone know where I can get a TM compatible adjustable hop up unit for M92?

thanks

I've heard of the mag problem with KWA ptp's before, but not with HFC. Seems like there is some form of 'break in' required. Most reliable fix seemed to be to fill the mag and let it sit overnight: worked like a charm.