AR15.com has released a new video gel testing the Marine Corps’ new Mk318 Mod 1 5.56mm round. The testing is done from a 10.5″ AR.
Spoiler…Lots of disruption and penetration on display.
Small Arms Defense Journal’s interview from 2015 with Sal Fanelli gives a bit of interesting background should you want to know more about the origins and thinking behind the Mk318.