Hi everyone, here’s a quick video testing out my new micro AR upper sent to me by KAK Industry!!! The barrel is 4.75″ and it’s chambered in 5.56. This results in a lot of gasses not being utilized, and thus creates a GIANT flash. It’s basically a flash bang hot .22, with the bullet only traveling around 1800 feet per second out of the 4.75″ barrel. Enjoy!