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I HAVE BUILT MY FIRST SKS (YUGO) AND IT WILL NOT SHOOT IN SEMI-AUTO I HAVE USED A NE GAS VALVE NEW GAS PISTON NEW GAS TUBE AND OPP ROD AND SPRING

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  • reece279 Feb 08, 2010

    yes the gas valve hole is in line with the hole in the valve housing when fired you can smell the gas bit piston will not move or op rod you must eject the empty shell by hand also

  • reece279 Feb 08, 2010

    it will not chamber a new round if the recoil spring is to heavy how do i fix that
    thanks for the help

  • Adrian Ahrens
    Adrian Ahrens May 11, 2010

    Have you put the gas plug in the correct way?

  • Thermo King
    Thermo King May 11, 2010

    When you fire, will it put a new round in the chamber? If it reloads, it's self then it is in the trigger mechanism that will not allow the follow up. But if she will not put a new round in the chamber you may have too heavy a recoil spring..

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  • 2,418 Answers

If your rifle reloads a new round but will not fire it is a problem with the trigger mechanism, if it does not reload a new round but locks back like the clip is empty, you have a problem with the clip spring not forcing a new round up hard enough to feed, if it cycles the receiver and does not pick up a new round your recoil spring is to strong or you need to open the gas port some more.

Posted on Feb 08, 2010

  • John Fourteen Six Feb 08, 2010

    Is this a SKS or an AK type. The SK has a gas tube and port on top of the barrel and the AK has the port and tube on bottom.

  • John Fourteen Six Feb 10, 2010

    reece279 I would like to know more about your project, what type of ammo you are using. Are you using the barrel with the grenade hook?

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Gun will fire but bolt only comes half way back


Gas port plugged from carbon build-up.
Not allowing enough gas to hit the piston of the operating rod.

One tool you need that isn't normally in the cleaning kit:

http://www.ebay.com/itm/TWO-2-SKS-GAS-PORT-CLEANING-TOOLS-UNISSUED-FREE-SHIPPING-/321305505195?pt=LH_DefaultDomain_0&hash=item4acf4cedab

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Remove gas tube (with the upper forward handguard), and the fitting on the barrel that the front of the gas tube plugs into, look down the hole, and you'll see the gas port.

The below pic shows where I'm talking about:

http://www.koreanwaronline.com/arms/sks/jpegs/figure16.jpg


And what the gas port looks like:

http://yooperj.com/page08/08yugo_gas-block%20(4).JPG

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