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Help on Mak-90 malf

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What would cause a semi-auto MAK-90 AK-47, milled receiver, to double up or go FA on 2-3 shots? This has only happened twice and after the first time a new trigger was installed, which seemed to cure the problem. This seemed to happen when using a certain magazine, although I dont' see how that could make a difference.


I know that everyone is hesitant to talk about full auto in general for obvious reasons, but I am asking so I can find out what to look for and repair to make sure this never happens again. I'm not a novice with firearms, and everything I have is legal, but I just can't figure out why this happened.


Any help would be appreciated.

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I'm no expert, but, it sounds something like a slamfire to me.


In case you don't know what that is...



Make sure your bolt face is clean especially around the firing pin so it doesn't get stuck, and see if your MAK has a firing pin spring to hold it back during regular cycling.


Anyone else got any ideas?

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Buddy of mine had a .22LR AK that went FA on him at a public range that has pretty restrictive rules. Lucky for him it was a .22 and nobody noticed. The range is frequented by local LEO as well. Consequently, that rifle was returned to the manufacturer for a replacement. As it was a new rifle, I'm guessing maybe a slam fire because it was gummed up with cosmoline?

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