|February 17th, 2017, 00:47||#1|
Join Date: Aug 2006
Double Feeding with midcaps - Possible solution
I recently bought a new classic army mp5a3.
When I tried it out with the highcap it worked quite well, without feeding problems. I tried two CYMA midcap magazines and to my disappointment it caused feeding problems. It would double feed.
I read online about changing the bucking to fix this, but because I am quite new and the gun is brand new, it seemed too invasive and I didn't want to break the gun taking it apart.
I turned the gun upside down to inspect the feeding nozzle. I put a bb into the nozzle, I followed up with another bb. I gave it a little pressure with a tooth pick and observed two BBs get pushed into the chamber.
I suspect that the midcap is feeding with too much force, causing two BBs to be lodged in front of the nozzle.
I decided to trim the springs in the midcaps and I am happy to report that it improved my feeding substantially. With a magazine of 60 rounds loaded, it only double feeds once or twice.
Here are the steps I followed, in case someone else has a similar problem.
1. I took out the pin at the top of the midcap to remove magazine from the metal sleeve.
2. I located a small door with a screw on the magazine where the spring is housed.
3. I unscrewed the screw on the door and the spring popped out. On one end is a plastic nub that pushes the feed lip. The other end is a plastic piece also acts as the door as mentioned above.
4. I trimmed the spring gradually, I think I have taken off three inches or so.
5. Re-assembled the magazine.
6. Test fire, good results but not perfect.
I read somewhere that changing the small spring located near the feed lip will help as well. Can anyone comment on how this would stop double feeding? Would I be putting a stronger spring in there?
Hope this helps!
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