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Discussion Starter · #1 ·
How hard is it? I watched a few videos but can’t find any that show the process with great detail. I may have to replace the hammer spring in mine so trying to get enough info and courage to try it. Thanks.
 

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Push out the hammer axle pin and the hammer will come out under spring pressure. Switch the spring and push back in. Most here recommend a vise to hold the pack as a 3rd hand. I just lay the pin up on the table and push against the table. The rifle springs are easier because are shorter. Why are you changing springs?
 

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Discussion Starter · #5 ·
I just had a MP5 built and the builder suggested maybe changing it out based on the pack I sent him with my parts kit. So I may take the spring out and examine it visually.
 

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I just had a MP5 built and the builder suggested maybe changing it out based on the pack I sent him with my parts kit. So I may take the spring out and examine it visually.
If you decide to replace the spring you might consider this one. It is a more versatile one in that
it works for multiple calibers. While the title says burst paks it will work in non burst paks as well.

 
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