herohog.comherohog.com/GunBuilds/Practical_Scrap_Metal_Small_Arms... · 2018-08-20 · A second...
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herohog.comherohog.com/GunBuilds/Practical_Scrap_Metal_Small_Arms... · 2018-08-20 · A second drill bit is modified by grinding off its tip and is used to finish the flat profile