POTD: Mark Serbu’s Barrel Test Gun

By Hrachya H

Barrel Test Gun (BTG) is what Mark Serbu calls his new project gun which unfinished version is today’s POTD. Overall, this gun is somewhat similar to the Serbu Q22 pistol except it is made to test barrels of many different calibers, particularly, the DIY rifled barrels that Mark Serbu has been experimenting with lately. This receiver set […]

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Source:: The Firearm Blog