Norinco NS522 build: NEW MAG RELEASE

Tanh said:
Take a look at your bolt. There might be some fines in there that's creating rough travel. That's what's happening to me.

The 2 piece firing pin has a little extention that travels along the incline and locks into place. Well the metal there is soft and on mine after a few cycles has worn down quite a bit. I'm sure this isn't that much of a problem but after few thousand rounds that part might need to be replaced. I kinda wished they used a harder material there.

I also fully disassembled my gun and smoothed everything out. Put radia on every edge that's not part of the sear engagement. There were burs everywhere. Now she's smooth and cycles almost effortlessly. It's a great design but quite rough around the edges. Next step is to apply HBN to all contact surfaces.
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Interesting.

I now have over 10,000 rounds through mine and my firing pin looks like new.
 
No doubt and mine could be an isolated incident too. Really though, I'm making a mountain out of a mole hill. It's only a small indentation too. Say about .015 or so after 200 rounds of yellow jackets. Not a big deal in the grand scheme of things. Just the fines got into the bore and made it harder to open so I mentioned it.

On another note I'm not really satisfied by the lack of information about this gun. On the net or even on CGN. Kinda like we're a small band of fellows with a secret.
 
I took the whole rifle completely apart (holy crap the extractor/ejector was a huge pain in the ass!!!) was tough to get the grease out of there
 
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luke s. mines not like that either. mine binds slightly when sliding back unless i have the handle all the way up. mines mainly hard to close the bolt. like in your video where you can see the bolt go down half way then require a little more effort to close. its as it rides over the final corner of the ramp. im going to take it all apart again and do some light sanding and cleaning of grit.
 
heres a few pics showing where i took a little material off my bolt lug.


relationship to ramp on action.


you can see the wear marks on the back of the bolt lug. i didnt file there at all because i dont want to change the head space. just took the "corner" off a little. i sugest using a sharpie and mark it. cycle a few times to see where the wear marks are then take a little of there and repeat. the metal was pretty soft and a normal file cut it easily.
 
Luke.
It looks to me that the two little lugs on the bottom o the bolt handle section might be catching on the sear on the way back. Try just the bolt handle in the action.(will be awkard with nothing guiding it) could thin the sear a little. And or increase the gap between those lugs. Though they are action locking lugs too so I wouldn't shorten them too much. Let us know if that helps.
Others thoughts?
 
bobdbldr said:
IF it was that would it smoothen out if the trigger was held down? Might be a test before removing metal.
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It would still do it with the trigger pressed because the sear will still be up. The sear only drops via the force of the bolt spring being more powerful. The sear is basically getting pushed out the way verse dropping out the way. Take the trigger unit off and then try cycling the bolt. That will let you know straight away. Trigger unit comes off via two screws.
 
My one was shooting large groups with lots of flyers until I noticed it came with a small punch mark at the muzzle that was causing a bump distortion to what should be a normally fully round crown. I had the muzzle re-crowned and now it is shooting nice small groups. Anybody else seen this small punch mark at their muzzle?
 
Received mine yesterday, it has a small chip and some weird look in the blue near the tip but the crown looks perfect. Not even done cleaning all the oil, the first shooting test will be this weekend.
 
I just took the rifle apart for the first time. It really is dipped in oil... Mine also have some resistance to close and have that sort of 2 stages closing we see in the video.

I'm really new to firearms tech, basic gunsmith and maintenance and I have a question for you guys.

When I took the action apart, the first thing that struck me is there is no recoil lug. Is this common on .22? I guess it might be as these don't have much recoil at all..
 
On the smoothness of the action. Mine was like that a bit too if I force the bolt. It snags a bit with any sign of side force. I stripped all the oil out and will be using dry lube soon but it's bare metal for now.

Anyways, rough bolt travel until I disassembled the action. Especially the mag well and bolt guide. The bolt guide had extremely sharp edges and a huge amount of burrs. I took some 240 grit to it and smoothed it out and put a very slight radius on all surfaces that'd mate with the bolt. Did that with the action as well. Now my bolt can slide in and out by gravity. I can operate it with one finger but as soon as I apply any amount of force it binds. Once the lube comes in I think that'll solve it.
 
I had mentioned this a few posts ago when the topic of lapping the bolt lug came up. You can reduce the high spot slowly and even a small amount of material removal would help. BUT,
If you are fed up with it, then by all means send it back.

I have reduced mine with spectacular results. It was going to be my next update to this thread.- when I can find the time!!

Anyway, if you decide to do it, only remove material from the bolt into battery travel and not the actual resting surface area, as this will affect your headspace. This will happen naturally anyway and all You will do is accelerate the wear.

Update pending....
 
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