G&P Woc problems

[crkshot22]

Hi,
My WOC has been giving me some trouble lately. When I fire the bolt carrier is getting stuck and won't return all the way forward. I thought the problem might be the wear on my g&p bolt so I bought a new aabb bcg and its still having the same problem. If any one has an idea how to fix this any help would be much appreciated.

Thanks

[MattyB (Immortal)]

There's a little plastic tab that sits on the left side of the carrier and helps keep the bolt/nozzle aligned inside the carrier. Is that still there? Mine broke at one point and caused all sorts of problems with cycling.

Also, what mags are you using? If I stick my GHK mags in too far the bcg gets stuck on the mag.

And I'm also pretty sure at one point I forgot to reinsert the spacer in the buffer tube and the bolt was able to go far enough back to get caught on its way out. However, I have an ACM magpul UBR tube on my gun, so I don't know if that would happen with the stock buffer tube.

[crkshot22]

No the plastic piece is still there. I'm using the stock wa mag so that shouldn't be causing problems. I never took the spacer out of the buffer tube so I don't think that is the issue. It was working fine but then I took out the bolt to put in an npas and it hasn't been working right since. I bought a new bcg thinking I had somehow messed up the old one but that didn't fix the problem either.

Thank you for the reply.
Any other ideas as to what the problem may be?

[MattyB (Immortal)]

Did you get the NPAS nozzle or just the internal valve thingy? If it's the nozzle maybe it's not sitting properly in the carrier, or the red O-ring is too big and you need to try putting back on the black one from the original nozzle.

Can you elaborate on where exactly everything is getting stuck, and like if you pull back the charging handle if that does anything to free it up and let it move forward, or if you remove the mag (I know it's the stock mag but new nozzle could affect it).... etc.

My woc is messed up too at the moment, the charging handle snapped and I've been lazy in getting around to buying a real one, modding it to fit, and using a rubber spacer to catch the carrier. All but 1 of my 5 GHK mags generally work terribly though so I'm not missing out on much until I get the cash to buy some fricken WA mags (or maybe gamble on Pro-Win).

[Exile]

Sounds like your bolt is traveling back too far, do you have the spacers in your buffer tube?

[crkshot22]

I got an element npas kit and tried installing it in the nozzle but it never fit so I just put the nozzle back together and put it back in. Then I ordered a new bcg when the problem kept happening because I thought I had just broke something but it still happens with the new bcg.

I've been told by a couple of people it might be that the spacers in the buffer tube are causing the problem but I never took that apart so I don't see how the spacer could have fallen out. I'm going to buy a set of spacers and try them out just in case.

Its getting stuck about midway through coming back. Usually the nozzle makes it all the way forward but the bolt carrier gets stuck about midway through. Pulling on the charging handle does free the bolt and allow it to return to the full forward position.

[MattyB (Immortal)]

If the nozzle is in front of the carrier then it's either not being pulled back to begin with or is jammed in the carrier so that the carrier pushes the nozzle to the breach and stops. Did you damage anything when putting it back together, or maybe forget to properly clip the nozzle back onto the carrier?

If it was a spacer prob the carrier and nozzle would be jammed way back, or in any event even if the spacers were a problem it should be a seperate problem from the nozzle/carrier not moving together.

[crkshot22]

Sometimes they move together sometimes only the bolt carrier gets stuck. I clipped them back together using the c clip they came with. The old bolt has some wear on the bottom so when I put the old nozzle back in it was damaging the oring on it. That is one of the reasons I got the new bcg. That one is brand spanking new. I just had to put the bolt in the carrier and clip it with the plastic clip. I'm still having the same issue with both bolts.

[MattyB (Immortal)]

When they move together does the entire thing get stuck? Or does it cycle properly? I'm running out of ideas, but it sounds like it must be some problem with the nozzle interacting with the carrier. Did you lube it up at all? I read on gasguns.info that cylinder grease for aeg's works great for lubing that o-ring. Then I use a bunch of silicone oil too. Maybe if all the lube was gone it could bind up sometimes. I would still double check if you haven't already and make sure that plastic side tab on the carrier isn't cracked and is seated properly, as when mine broke I had pretty much the exact symptoms you're having.

As for the o-ring damage, my carrier was doing the same thing, so when I got the g&p negative pressure nozzle (not adjustable, just np), I filed the lip of the carrier to remove the roughness.

[crkshot22]

Thank you for all the help guys I finally got it working normally again.

MattyB you were right it wasn't a buffer issue. The problem was the oring was torn on the original bolt thanks to the wear on the carrier cutting it and the red oring on the new aabb bolt was too big. Once I changed the oring to the black one that came with it it started working fine.

Thanks again for all the help guys.