Type 81 Side Rail, Stiff Safety

Z

Zortron

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I bought a type 81 side rail from TI (Ak Master Mount) and mounted it to my Type 81 SE yesterday.

With the rail on, the safety becomes so stiff that it can’t even be moved. Yes I installed everything correctly. My working theory is that there was some deflection in the drill when they made the receiver pin holes, and with the relatively much more rigid side mount, it creates enough strain in the receiver to bend the hole for the safety just out of spec and produce enough friction to halt it. The safety still moves back-forth against the copper spring plate but will not rotate. I also tried with a replacement safety I bought from TI with the rail kit, no luck.

Has anyone else run into this issue, with the safety being very stiff with a side rail mounted, or found solutions?
 
I read something about that here or on Reddit, it is quite common apparently. Someone more versed will be along shortly to expand.
 
Me too. Safety is quite stiff since adding an AK Master Mount side rail. My plan is to work it a bunch until it "clearances" itself.

Added the Heron Arms side rail to another type 81 and that safety is as smooth as it gets.
 
Rust said:
Me too. Safety is quite stiff since adding an AK Master Mount side rail. My plan is to work it a bunch until it "clearances" itself.

Added the Heron Arms side rail to another type 81 and that safety is as smooth as it gets.
Click to expand...

If you swapped the Herron rail onto the gun with the stiff safety, does it make any difference? Would be good to know if a different mount really has any effect or if it’s just mount vs no-mount which affects the gun. For my part, I have another type 81 with an AK master mount on it, and the safety works fine.
 
Its Type 81 specific on a individual basis. I believe it has to do with the shape of the safety plate, and the size of the radius the bottom of your receiver. If ur Type 81 has a tall safety plate and a large radius on the bottom, when the threaded pins pinch the safety plate against the reciever wall, the bottom rides up on the reciever radius thus applying force on the safety.
 
Like butter on mine. Maybe take the safety out, put some oil on it and try again. I really can't see why this is an issue looking at the way it works.
 
Murray 3-D said:
Its Type 81 specific on a individual basis. I believe it has to do with the shape of the safety plate, and the size of the radius the bottom of your receiver. If ur Type 81 has a tall safety plate and a large radius on the bottom, when the threaded pins pinch the safety plate against the reciever wall, the bottom rides up on the reciever radius thus applying force on the safety.
Click to expand...

This right here. Some of mine work good but then on others it's perfect
 
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