Most AR15s fire 223 Remington or 5.56 NATO ammo,

Most AR15s fire 223 Remington or 5.56 NATO ammo, although AR15s have been chambered with a number of other ammunition types, including 22 long rifle, 204 Ruger, 6.5 Grendel, 6.8 SPC, 300 AAC Blackout, and 458 SOCOM. AR15s can also shoot pistol ammo, such as 9 mm, 40 Smith & Wesson, and 45 ACP.



Compare the damage an AR-15 and a 9mm Handgun
This is why you carried the paper and it shows > > puTzzz

Again it is the Bullet


AR 15 AMMUNITION

https://www.midsouthshooterssupply.com/dept/a...ammunition