Derya MK12 bolt sticking

M

Moe

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Fredericton
So I noticed on both the MK12's I picked up that if I place a loaded mag into the gun on an open locked back bolt, that sometimes the bolt will not release and requires the mag to be removed and reinserted before it will release.

I do not jam it in harshly at all and wondering if anyone if others see this issue.

I have the original 2rd and 2 x 5rd mags for the one MK12 I have now and an additional 4 x 5rd mags that are slightly longer (1/2") and openings on the side to check shell count.

I don't know which mags are the newer design and unsure if the older or newer ones are the cause. Will pay more attention to that next time this happens.

Thoughts?

Cheers
Moe
 
Update. The solution is simple. On the mag, where the mag catch hole is located, there is an area just above and just below the hole that is pushed out (a bump) a little. Using a screw driver or punch and hammer, or needle nose pliers (I used all and the common screwdriver worked best for me. Just pry the lower bump out a little. Stops the over insertion that was causing the bolt freeze.

Cheers
Moe
 
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