What coil spring size do i need to convert my kalashnikov 74 mini?

Joined
Mar 12, 2022
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Hello, I have a boker 74 kalashnikov mini, and I was just curious on which kind of spring size do I need to convert it to auto? I am on knifekits.com and I see 3 different types of coil springs that might work, a .43, a .50, and a .375.
 
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