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17 HMR 3/4 scale ar15

7K views 33 replies 14 participants last post by  1biggun 
#1 ·
I wanted to do something special for my sons birthday, so I was thinking he already has some guns but what about a .22lr 3/4 scale ar15 (sp01). Then after shooting a friends 17HMR I was hooked. So here is the upper receiver almost finished (17hmr) and the .22 lr lower. I will cut a new lower and send it out for engraving. Here it is with its big cousin, an ar10 I milled



Of course there is still a lot of work to do on the upper (thread for barrel nut, final contour, ejection door and smoothing the contour of the rear(will be done after lower is cut)
 
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#31 ·
OK back on this.

Son is 7 and has a lightweight ar 5.56 he is running but I would like to finish this one up. The 17hmr pressure spike and ruptured cases in a semi have not been 100% solved so i will go with a 22 magnum.





Need help with a compact semi auto trigger design. The mossberg 151 comes to mind
any other?
 
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