AK Sponsor
Posted: 10/19/2006 12:47:51 PM EDT
|
Hi, I'm new to the forum and new to building AK's. I'm 90% done with my first Romy-G AK build. Everything's functioning fine with one exception: I can't get the dang dust cover to stay on. I've done a little sanding to the rear receiver rails where the rear trunnion fits on to try and make it fit better, but I don't think that's addressing my real problem. The dust cover seems to lock into place, but when I rack the slide, the front of the cover comes out of the its groove in the gas block. Here it is now, as you can tell it's not being held on by much: http://img168.imageshack.us/img168/7137/3yo3.jpg Here is how things are lining up at the rear trunnion: http://img175.imageshack.us/img175/304/2pk1.jpg and a look inside: http://img128.imageshack.us/img128/5417/4si0.jpg I've tried to move my front trunnion back and my rear trunnion forward as far as possible (read: not much) without messing up my screw holes, but this didn't seem to help any. Is my only option to find a way to move my rear trunnion forward somehow? Or do I have other options here I'm not seeing? Thanks in advance, |
|
I believe your problem is that the rear trunnion is back too far. This probably occured since OOW receivers are too long and need to be trimmed at the rear. I'm guessing that you didn't test the fit of the dust cover before installing the rear trunnion? You can try to bend out the rear of the dust cover a bit so that it'll fit better. You can also try another dust cover as they're not always the exact same length. You might get lucky and find one slightly longer. |
|
No, I didn't check first. I was under the impression that they just had to fit flush with the ends of the receiver. I might order another cover and see if I luck out, since they're so cheap. My friend built one at the same time as me, using the same methods, and didn't run into this problem, I'll check his cover and see if it works. It's a screw build and they're not locked down yet, so I can file all the holes forward some if it gets to that. The only problem would be figuring out how to fill the back side of the holes so the screws don't just slide back to where they were to start with. |
|
Did your friend also use an OOW/ITM receiver? Basically you should follow the building order of these steps. 1) Install trigger guard. 2) Fit front trunnion. Install a mag to make sure front trunnion placement produces a good snug fit for the mag before drill the holes in the receiever for the front trunnion. 3) Install barrel. 4) Install rear trunnion (tang) and make sure dust cover fits snug before drill the holes for the rear trunnion. |
|
Yes, we ordered receivers from the same place. Oddly enough his rear trunnion is even farther back than mine, yet he has no problems. I did all the steps you listed in order but just skipped the dust cover part. He'd already finished his by then, so I didn't think to worry about it. If I were to grind some off of the rear trunnion and the rear receiver rail, would this move the cover forward, or is the spring going to keep pushing it back regardless? |
|
Well, hmmm.... do you have a welder? If so, I can think of two things you could try doing. 1) Fill in your rear tang holes with the welder and start over with better placed holes. or 2) Add a few small tack welds at the locations of the red arrows below.  Did you try bending out the rear edge of the dust cover to see if that helps any? Also, I'm thinking that maybe your friend's dust cover may be slightly longer... try seeing what happens if you try his dust cover on your rifle. |
|
Thanks for all the replies guys. I haven't had a chance to try a different cover yet, but should this weekend. I have a real simple question though: Is the rear of the dust cover spupposed to rest against this piece of metal? http://img118.imageshack.us/img118/5069/4si0fy5.jpg Or is there supposed to be a gap there? If there's supposed to be a gap, I think I can do some work to make the rear of the dust cover fit down on the receiver a lot more solidly. If there's not supposed to be a gap and it's going to keep moving back then I don't need to waste my time messing with this. Thanks. |
And that's the reason why a lot of people don't like pre-drilled receivers like the NDS-3 economy receiver. The holes are predrilled so you can't adjust the postion of your front trunnion and rear tang. By drilling the holes yourself you're able to get that "perfect" fit. |
|
Slide the cover all the way forward and see how much of a gap is between the rear trunnion and bottom rear of the cover. Get a cheap set of feeler gauges at Auto-Zone or some thin stainless stell shim stock (arts and crafts, model/hobby stores usually have it). Use one of the leafs off the feeler gauge or shim stock, trim it/cut it to the dimenions of the back of the top cover and spot weld the piece to the top cover.  Round off the edges/blend it in with a grinding wheel or Dremel. |
|
What stinks is you have to have the bbl in place to really check dust cover fit. That means if you build from a bent blank at some point you have to guess a little if its going to be long or short. Last one i did, receiver was too short, easy fix bend in the dust cover bottom edge. just finished with a receiver too long issue and simply heated up the dust cover bottom lip and bent it back. I think the simplest way is to err on the side of reciever too short, that way you can always shirnk the dust cover.. |
|
"the top cover isnt the only prob you have pull the carrier all the way back chances are its going to pop out of the rails if thats the case you need to move the rear trunnion up" Or you could install a buffer to stop the rearward travel of the bolt carrier. Ask me why I know about this.  |
|
"the top cover isnt the only prob you have pull the carrier all the way back chances are its going to pop out of the rails if thats the case you need to move the rear trunnion up" Not only have I pulled the carrier back, I've shot the gun. I've put about 40 rounds through it and the only problem I had was with the dust cover. |
|
I had the similiar issue with my OOW receiver. The top cover that came with kit just wouldn't fit on at all. Seemed like they pry'd it off the gun before torch cutting it. Tried some of my other top covers and found that the one on my Wasr10 fit just fine & vice a versa. |
AK Sponsor