4K Tutorial: H&K USP 10mm - 10 is the Correct Amount of Millimeters

135K views · 9 years ago · 6:38

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LifeSizePotato

Educational creator

Sep 11, 2016 · 135K views

Note: I have been told that finding aftermarket barrels to ream to 10mm is extremely challenging now. Please research parts availability before gettin

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