More ideas from mark
No security system is complete without lasers. So in this project I am going to show you how to build a laser tripwire alarm from a laser point, a...

No security system is complete without lasers. So in this project I am going to show you how to build a laser tripwire alarm from a laser point, a couple of.

OATH THR 12 gauge 602 grain copper shotgun slug before and after expansion (934 x 1600) courtesy r/EngineeringPorn.

Is "bad ass pretty" a term? OATH THR 12 gauge 602 grain copper shotgun slug before and after expansion x courtesy r/EngineeringPorn.