10mm magnum

  1. MachIVshooter

    10mm AR

    So, early last summer, I ordered a 20" 10mm barrel blank from Green Mountain, the intent to build a Stoner gas system AR upper. I picked up an upper and BCG around the same time, and opened up the bolt face and extractor to accept 10mm cases right away. But it took me until now to get around...
Back
Top