High speed motor and drum magazine feed issue. (CYMA RPK/Drum mag)
 

Alright, so my RPK has been upgraded for a high ROF setup and I've got a bit of a problem, the motor is literally too fast for the magazine to keep up with, or so I think at least.

I don't have specifics on how fast its shooting, but I can't feed consistently through my CYMA drum magazine without holding the winder button down. I'd do this, but the gun is very awkward to hold in such a manner. I would prefer it to simply feed normally in between winds.

What can I do to improve feeding with a High ROF setup?

Thanks!

You could wire the drum mag into the rpk's circuit so it winds whenever you fire it.

Thats something I want to avoid actually, I have multiple drums and don't really want the hassle of wires hanging off of the gun.

mod the drum with a remote line, have it leat to under your thumb of your trigger hand attach it with velcro, works for me on my M249.

Guess that is the only real option, huh? Hmm. Alright, I'll look into that.

easiest way to do it is get a flashlight remote, cut off the screw cap, and splice the wiring into your box mag's switch.

You can also mod it to be sound activated... takes a bit of knowledge, but it is basically a simple OP-AMP wired to a comparator... when enough noise is made (for example, the gun shoots) it triggers a 2sec timer that activates the motor. The timer is reset as long as there is noise in the 2 seconds delay...

So basically 5$ in electronics... about the same as a flashlight remote.