New Ak big problems.

[Appaloosa]

I just bought a new yugo m70 AB2. I shot it today using golden tiger ammo. It would jam every round. It was short stroking. Sometimes it wouldn't extract the spent casings, and I had to hit the charging handle pretty hard to get them to eject. The bolt wouldn't travel back far enough to chamber the next round. The times it would eject, the bolt would catch the spent casing on its way out of the rifle.

The grenade sights are down, and it would try to cycle so I don't think it is the gas system.

When I would manually pull the bolt back all the way, and let it go it would chamber the next round with no problem, so I don't think it is the mag.

I think I have a really rough chamber. What do you guys think? Also what would you guys recomend?

 

[Tokugawa]

One thing at a time- you say the bolt is not coming back far enough to eject the empty case. Also, that the bolt is not coming back far enough to pick up a new round.
Unload the weapon, and clean and lube it. Remove the recoil spring, and see if the bolt slides smoothly along the rails. Install the spring, and see if the bolt slides smoothly along the rails. ( does this weapon have a guide rod inside the recoil spring? I have seen them jam) I do not know anything about the gas system for the M70, in regard to the grenade launcher- it is possible some gas may be bleeding off. Someone with experience will chime in here I am sure!

 

[Appaloosa]

I have tried that, and the bolt does move smoothly without the spring in. It does have a guide rod in the the spring.

 

[Skofnung]

Scrub the chamber and try again. If that fails, try different ammo. If that fails, replace the recoil spring.

Past that, take it to a gunsmith.

 

[Firepower!]

To me it seems like you have problem in the recoild spring. I think you should as advised by Skofnung replace it. However since you said that you just bought it. I would take it back in the shop and ask for new as a replacement.

I say this because once there is poblem in a gun from day one why fix a new thing. You paid for a new gun not for one that need to be fixed. The problem can re-occur down the road. Whereas if you get a good AK to begin with you can shoot it to death and it would still run. I think you are sold a defected or refurb. gun.

 

[fchavis]

Another possibility that I have seen cause a short stroke in an AK is a mis-aligned gas port hole.

 

[Starship1st]

Appaloosa:

Did you buy the gun locally or order from the internet? I am about to buy an AK and researching who has the best deals and good customer service?

Thanks and lol.

 

[R127]

What sort of magazine were you using? I know you said it seemed ok but this kind of thing is not uncommon for an American made or aftermarket magazine. Always try a good condition military mag, even if you were using a military mag to begin with. It's easy and often fixes problems.

Is it very hard to hand cycle the weapon? If not then it probably is not the recoil spring. I would suspect something is wrong with the gas port or gas block. As I recall Yugos are not chromed and were used with corrosive ammo so it is possible something is corroded out of spec.

You should be able to visually inspect the chamber and bore for problems by stripping the rifle and using a light. It would have to be pretty obvious to make the rifle not work. While you're looking in the bore try to locate the gas port, it should be visible as a hole or nick on the top side obviously. Try to see if it is obviously gunked up. While the rifle is stripped poke a wire through the gas port hole in the gas block to push any gunk out. If there is anything you should be able to see it in the bore if your rifle is clean.

The AK design itself is not problematic by nature and there is no voodoo involved in troubleshooting or maintaining it. If the ammo is good and the magazine is a good military mag the only thing left is a plugged hole, broken parts or a really bad build.

 

[LeibstandarteAdH]

Gas system, most likely caused by canted or incorrect install of gas block on the new green mountain barrel, had it happen to one of mine, called century and sent it in for repair, the re-pinned the gas block and all has been fine. Mine did not look canted, but it was slightly off the hole or something because it came back with the same GB.

AK's should not be short stroking. IF you can operate the bolt with your hand, but the gun hags up on extraction and such (short strokes) like your saying, its the gas system. AK's should be OVER operating by design to overcome enviromental and hygenic extremes and such, not under operating.

 

[rockinrussky]

Quote: Another possibility that I have seen cause a short stroke in an AK is a mis-aligned gas port hole.

I'll second that diagnosis, as I've had that exact same problem with a Century-made WASR. Basically not enough gas was coming through the port hole and caused a short stroke. Contact the seller or manufacturer they should be able to realign it for you.

 

[stubbicatt]

+1 on the gas system. Another possibility is that the gas block is so badly corroded that it allows too much gas to escape to effectively cycle the action.

If it hand cycles readily, then your issue is with the gas system.

 

[Tokugawa]

Appaloosa, you said the bolt would move easily with the spring out- what about with the spring in? I am a bit suspicious of the recoil spring guide, you say it is a rod inside a tube? these can be sticky.

 

[dogcatcher101]

i bought the same gun, it come with a yugo mag and was jamming as well, i grabbed one of my older romanian mags and it has worked fine every since.

 

[deth502]

What sort of magazine were you using? I know you said it seemed ok but this kind of thing is not uncommon for an American made or aftermarket magazine. Always try a good condition military mag, even if you were using a military mag to begin with. It's easy and often fixes problems.

oh yeah, ive had that problem.

ill NEVER buy another usa ak mag

and as was mentioned, yuo can easily try to run a wire or something through the gas poet to check for obstructions.