KSC MP7 Issues aslfter parts upgraded
 

I had received a KWC MP7 of my friend and it wasn't working due to the return springs in the bolt being fubar. I had added the new springs into a heavier bolt with a rocket valve and now when i pull the trigger with a loaded mag it kinda just spits out the bb, thats about it doesn't have enough to cycle itself. I am used to my m4's and m16's. If this is in the wrong section I apologize it wouldn't allow me to post it in the doctor's corner.

I think you answered your own question.

Heavier bolt.

Start out will all stock parts and see how it runs. Then start swapping in the new stuff.

Ok i was given the gun as is the thing was kinda in pieces. Thanks

Swapped back to the original bolt and it still is doing the same thing.

Check the seal in the bolt. It can dry out. It's inside part #23 on the exploded veiew.

http://kwausa.com/files/8713/0565/25...S08V01_MP7.jpg