[ET(end tyranny)]

Sources with the Bureau of Alcohol, Tobacco and firearms told News4 it is likely a Colt AR15, much like this M-16, or a Ruger Mini 14.

Does anyone know if these all use the same ammo?

[Dead Dog]

Yes, and the AR does not have to be a Colt.

[FormerLurker]

The rifle used could also be a simple bolt action rifle such as the one shown below...

Savage Tactical Model 10FP .223

[Skooz]

Yes. The AR-15 and M-16 both use the .223. I used to own an AR-15 and it is an amazing rifle. You can hardly miss. I had a friend who had literally never touched any type of firearm in his life. Within 15 minutes he was picking off beer cans at about 100 yards.

One need not be any kind of marksman to accurately fire an AR-15.

[Crowcreek]

"Sources with the Bureau of Alcohol, Tobacco and firearms told News4 it is likely a Colt AR15, much like this M-16, or a Ruger Mini 14. Does anyone know if these all use the same ammo? "

Yes -- Alchohol, Tax, Firearms, and News4 all use the same ammo.

:^)

[FormerLurker]

Another possible rifle that the sniper may be using..

Remington model 700 Police