Jeremy S Youtuber was out testing his Gen3 Glock20SF 10mm using the Underwood Ammo Xtreme Penetrator round against a Level IIIA plate used in a bullet proof vest, to see if the round would go through. Here’s what happened: After squeezing the trigger BLAM! The shot was loud and debris peppered his face. There was a stinging feeling in his shooting hand. Once it registered in his brain what had happened he looked at the pistol. Sees the right side of his Gen3 Glock20SF frame had blown out, mag release missing. Obviously, there were some flowery words that followed after...