US Military Surplus Flak Vest: Does It Still Work?
This video tests the effectiveness of a US Military surplus flak vest, likely from the Vietnam to Grenada era, against various modern ammunition calibers. Despite its age and intended purpose of stopping fragmentation, the vest demonstrated surprising resilience, stopping .22LR, .38 Special, and .45 ACP rounds. It only failed against a high-velocity 9mm round fired from a short-barreled submachine gun, showing partial penetration. The instructor highlights that even old Kevlar can retain some protective capability, though it's not rated for direct bullet impact.







