[Fly 9]

I have a KSC Cougar GBB that has seen little action due mainly to a feeding issue it seems to have. When the chambered round is fired the gun will the follow through the action until the return when the slide doesn't return completely. This is due to a bb not feeding all the way and jamming the gun. Releasing the mag and cocking it while pointing down bandaids the problem til the next shot.
I would like to fix this problem but don't know how.

Also, time to time the mag won't slide in all the way. It still has maybe half an inch to go still.
I would also like to fix this problem.

Any ideas?

Thanks.