RPK cycling problems

Took out my new AES-10B this weekend and had all kinds of feeding issues. I checked over the parts, welds and function of the rifle before I left and they looked just fine. Used Remington, Wolf, and Tiger ammo. Rifle looked well oiled.

However, when firing the rifle:

MOST OF THE TIME:
Fired - ejected the round - cocked to fire - bolt closed all the way - but did not load a new round - then I had to pull the bolt (literally) all the way back so when I let it go it would even chamber another round.

SOME OF THE TIME
Fired - did NOT eject spent round - so I manually pulled back on bolt and ejected the spent round - then had to pull the bolt (literally) all the way back so when I let it go it would even chamber another round.

LESS THAN SOME OF THE TIME
Fired - ejected round - but new round did not load properly and bullet tip would be half way into the barrel.

I tried a variety of mags., all Romanian, I think. Forgot to bring my Polytech mags. to try. The stock 40 rounders the RPK came with are crap. On one of them the spring is stuck 3 inches in and I hadn't even loaded it. The rifle fired a "single" round just fine when hand loaded. On rare occasions the bolt didn't close all the way and had about a 1" gap from being flush. Only for about 1 mag. worth of ammo did the rifle function (almost) flawlessley but, interestingly, it appeared to work fine on the last 2-3 bullets in almost every mag. I used (2o rnds. max per mag.). The mags. lock into the mag. well good enough, but it does have some wobble back and forth. Does this sound like a mag. issue?

Thanks for any info. you guys have for me.

D Day

Took out my new AES-10B this weekend and had all kinds of feeding issues. I checked over the parts, welds and function of the rifle before I left and they looked just fine. Used Remington, Wolf, and Tiger ammo. Rifle looked well oiled.

However, when firing the rifle:

MOST OF THE TIME:
Fired - ejected the round - cocked to fire - bolt closed all the way - but did not load a new round - then I had to pull the bolt (literally) all the way back so when I let it go it would even chamber another round.

SOME OF THE TIME
Fired - did NOT eject spent round - so I manually pulled back on bolt and ejected the spent round - then had to pull the bolt (literally) all the way back so when I let it go it would even chamber another round.

LESS THAN SOME OF THE TIME
Fired - ejected round - but new round did not load properly and bullet tip would be half way into the barrel.

D Day

"most of the time" could be that there is enough movement of the carrier to eject the fired round but not enough to clear the back of the mag to grab a new round to load. (not enough gas pressure?). if it was a mag issue i would think youd have the same problem when you manually cycled the carrier

"some of the time" not enough gas pressure to eject the fired round?

"less than some of the time" enough gas pressure to eject fired round, enough gas pressure to barely clear mag and grab new round to be fired, but not enough inertia to actually bring the carrier and new round to ready to fire position?

anybody else?

Check the recoil spring. If you have another one you can swap it. Could be magazines and check the gas port.

I'll check it over tonight. I'm gonna try my Polytech mags out and see if those work any better than the cheap ones I got with the rifle. I have both a pre-ban Polytech and a newer Vector underfolder. Would the parts from those two rifles work in my RPK? I can switch 'em out and see if that helps. Thanks for the info. guys. I really appreciate it.

D Day

The RPK has a telescoping rod for a recoil spring guide, or it should have. Just about any standard AK recoil spring assembly should work though. Try the Vector one, not the Chinese one.