Ruger Mark pistol 80% receivers?


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Hi. For awhile now, I’ve been wanting to build a Ruger .22 pistol using a parts kits and home-made receiver tube/upper. Does anyone have recommendations for sources of the 80% (steel) receiver tubes? Thanks. 

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Hello Roy,

  I have heard Ebay is a decent source for some Ruger parts. Easy enough to check out/

 Good luck buddy

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There used to be a guy that sold 80% receivers, but the part is so easy to make I'd say just buy a 1 foot length of 1" .120 wall DOM seamless tube.(ideally it would be .125 wall, but this is close enough) tube from McMaster or your closest distributor.

You can buy a complete parts kit from GB to cover the other parts, but honestly I had better luck buying a complete MKii used for $150 that was in rough shape. Here is a link to a complete ground up build on caliguns.


The most important part is timing the barrel to the receiver, due to the integral feed ramp.

If you have any questions, ask away. I know this build like the back of my hand. I have a print set as well that I am unfortunately not able to post here for some reason but I could give them to you another way. 


Good luck and happy building.


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