Gun Jamming Problem
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?
The gun is using a PDI 190% spring and has very good compression.