Gun shops, gun shows, online retailers.
There is no legal definition of "assault rifle". If you mean an AR15 style rifle, then it depends on the rifle, and what you are hunting. An AR15 firing .223/ 5.56mm can be used for small game. For big game, the rifle may not be capable of holding more than 6 rds of ammo, and must be .24 caliber or larger, with 1000 ft lbs of energy at 100 yards. The AR15 in .223 will not meet those standards. A larger AR, such as the AR10, could meet them. No fully automatic firearms may be used for hunting.
The NORINCO CQ5.56.
Try AR15.com Try AR15.com
Assault rifle.
hardware store
The M4 is capable of automatic fire, the AR 15 is not
The SOAR (Special Operations Assault Rifle).
There are several different assault rifles - both by the true definition of an assault rifle and by the political motivated BATFE definition of a so-called "civilian assault rifle", manufactured by several different outfits. Which assault rifle did you have in mind, specifically?
The first true assault rifle debuted in 1942.
Not recommended.
It is the Carbine (short rifle) version of the AR15. AR stands for Armalite Rifle. It is a semi auto rifle.
You will need to define assault rifle, and where you live. A TRUE assault rifle is a machine gun, and transfers of them are tightly regulated by the Federal government. What most people CALL an assault rifle is nothing but a semi-automatic rifle, and in most of the US, does not require a license to possess.