Liczymy pasujące modele…
Contact me/learn more: https://marbleduck.com/ Several years ago, I machined a run of billet HK receiver mandrels. I still get the occasional query for them; unfortunately, I sold my shop when I went active duty and can no longer produce…
Update 9OCT2026: I continue to update these as I discover refinements. These updated models can be found on my site at https://marbleduck.com/articles/mandrel.html Several years ago, I machined a run of billet HK receiver mandrels. I…
Contact me/learn more: https://marbleduck.com/ This drilling jig, when paired with the below drill bushings and pins, can be used to accurately place the stock pin bushing, mag release, and paddle mag axle holes. It can also serve as a…
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