Do people hunt for sport with assault rifles?

As is well covered, an Assault Rifle is a select fire weapon and as such is generally not available to civilians, and even when it is is extremely unlikely to be used for hunting. read more

No, but they do commonly hunt with what the media and gun control proponents call assault rifles. Those are identical in function and caliber to traditional sporting rifles but have a modern style and are made of modern materials. read more

Semi-automatic-only rifles like variants of the Colt AR-15 are not assault rifles; they do not have select-fire capabilities. Semi-auto rifles with fixed magazines like the SKS are not assault rifles; they do not have detachable box magazines and are not capable of automatic fire. read more

Given what I've just related, it should be abundantly obvious that hunting with semi-automatic “assault rifles” is the norm, not the exception, and certainly not the definitive “no one hunts with “assault rifles” exclamations of gun control supporters. read more

If you mean real “assault rifles” (which have select-fire capability) then “none,” since there are only a handful of real assault rifles in civilian hands. If you mean the semiauto guns that are often referred to as “assault rifles” because of their appearance, then not all that many. read more