I know we can't use cans or MGs for hunting what are the laws (if any) regarding SBRs for hunting?

Im no lawyer,  but im guessing it falls to definition.   The hunting regs specify exactly what methods you can and cannot use to hunt.  
mi law

As you see, a sbr is not a rifle.  It has a seperate definition.  So if the regs say you may use a rifle to hunt, a sbr is probably no good.   Id be interested on a sbr under 26" as it becomes a pistol in michigan.  The regs usually allow use of a pistol but specify .38 as a minimum caliber iirc.  So.... youd need a big bore sbr under 26".


Or, the dnr will update regs to cover this issue before season....  stroke of a pen they can change legal hunting methods.

You start off so well with that statement...



and then you go and say this:
 


An SBR is absolutely a rifle.  It has all of the characteristics of a "rifle", as defined by statute.  An SBR is not a separate definition.  It's more of a sub-definition:

Sec. 222.

As used in this chapter:

(k) "Short-barreled rifle" means a rifle having 1 or more barrels less than 16 inches in length or a weapon made from a rifle, whether by alteration, modification, or otherwise, if the weapon as modified has an overall length of less than 26 inches.

Meaning, it has to be a "rifle" before it can be a "short-barreled rifle".  

You are correct to note that an SBR with an OAL of less than 26" also meets the state definition of a "pistol".  Which means to me, you could use an SBR in either role.  As noted, there are some caliber restrictions when hunting deer with a pistol, such as minimum caliber, and a straight-walled cartridge.  Those would have to be observed if a person wanted to use an SBR in that role.  



Yeah. Isn't that the truth?  Something wrong with an agency being able to change "the law" with no review, or input from the voters.

I agree with Garrett. A SBR meets the definition of a rifle. Therefore could be used to hunt where and whenever any rifle could be used.

But just call the DNR if you really want to know.