|
I had the same issue with my KJW M9, and it wasn't due to lube in the barrel. I discovered a couple of weeks ago while seeing if I could fit on a TM rightbore barrel that the hopup rubber was installed incorrectly from the factory. To prevent this slip, I would have to tighten the hopup so tight my BB would have WAY too much hop. Once I reassembled it with the hopup rubber installed correctly, I haven't experienced this issue.
__________________
|