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Mossberg 930 spx Cycling Issue

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8 comments

  • charliemeyer007
    Are you shooting good ammo loaded on the heavy side? While you had it apart did you de-burr the working surfaces? Did you apply some lube to the moving parts as you put it back together?
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  • Cheo2012
    I jus bought it , have not shot it. is a used gun. I dint de- burr, and yes I lube all moving parts.
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  • tsr1965
    Well...It's a Mossberg, so you cannot exspect much. I suspect it has to do with your gas metering system. Take your barrel off, an look to see if the gas port has an obstruction in it. Then check to make sure it is assembled correctly. There is the gas piston, O-ring, and friction sleeve that MUST be assembled in proper order for it to function.

    Best

    EDIT 1

    After re-reading your original post, it seems this is happening when manually cycling the bolt. These are not meant to be babied. They are designed to work under full force, and full pressure. Rip the bolt back hard, and let it go. Sometimes, in the lesser guns, there needs to be a jarring to get a spring to disengage, like the magazine tube spring, etc. If it is happening when firing the gun, check the O-ring, and then the other stuff I mentioned above.

    Best
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  • Cheo2012
    Thank you for the info, will call Mossberg for support to see what they said
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  • Mossbergboogie
    You should see if you can replicate this error by shooting the gun.
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  • tocamoha
    Call Havelin Sales for Mossberg questions.
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  • Mobuck
    I have a 935 and it displays these symptoms when shooting low powered ammo. Simply not fully cycling the bolt. I can't remember the internal of that gun since I haven't shot it for over a decade-gave it to Son for waterfowling but as far as I can remember, it worked great with any load over 3 1/4 dram x 1 1/8 ounce up through top end 3" mag.
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  • Cheo2012
    Thank you all for the info, I did what you said I rip the bolt back hard and it works good.!! thank you[:D][:D]
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