This AR-15 with a two-inch barrel takes it to another level and is just insane. AR-15 style rifles sporting shorter length barrels are high in demand these days. But how short is just too short on a registered short barreled rifle (SBR)? Well, try this one. Yes, that barrel is actually only two inches long. When firing the 5.56x45mm/.223 caliber cartridges, the tips of the bullets protrude out of the barrel. This can be witnessed in the video before each shot is taken. Is a 2″ barrel a good idea on an AR-15 rifle? Maybe not, but it does still...