is it under 30" OAL
If not, then it's a "RIFLE" and no registration is required in Michigan.
Just checked... it's 29.5" therefore it's a "Michigan Pistol" and can only be purchased with a PP or a CPL and RI-60 form.
It's a pistol in michigan just like your glock.
Calibers:9mm Luger40 S&WWeight unloaded:4.0 lbs. 1.8kgLength Open:29.5" 749mmLength Closed:16" 406mmBarrel length:16.1"408mmAperture rear, Circular hood, Adjustable front Practical range/ over : 150yds150mRifle features an internal keyed deployment lock. Rifle can be reduced to a size of16" x 7" to facilitate secure storage: 406 x 178 mm