Gun Jamming Problem

[Conflicts6]

hey,

So I've been noticing lately that my gun jams a lot. I am using Madbull .25g precision bbs, Systema rubber, SCS spacer, Prowin AK hopup (blue one), and a KN TN 6.03 455mm barrel. The jam always seems to be in the first 10mm of the barrel (the fist 10mm starting from the hopup. What could be going wrong? Could it be the BBs? Rubber?

Side note*

The gun is using a PDI 190% spring and has very good compression.

[GBear]

Same thing occurred to me, and I used the o so helpful search function that we have here for a reason. :P

Some others have had problems with Madbull BBs. Put a few drops of silicon oil in the bag and give it a good shake. Try that.

[Conflicts6]

Okay. Found an old thread. Maybe the hopup rubber is too far forward.