Hi guys I have a slr106 that I want to add a triangle stock to what is the best way to go about this. Also does anyone know where I can get a hobo can muzzle brake for this beast thanks.

Does it have a stock now? or is it a SLR106U  pistol?

It's a pistol

OK, You need to register it as a short barrel rifle with the BATF or add a permanent barrel attachment to make the barrel atleast 16 inchs overall.
Then you need to get the stock and hardware usually from KVAR or another source. It already has the folding trunnion installed into the receiver so you can  drill,dremil,mill,or file open both sides of the receiver where the holes for the hardware would go.
Tap the two pins holding the rear receiver plate out (top pin gets tapped into the plate). install the stock.

heres a link to my conversion     http://www.akfiles.com/forums/showthread.php?t=222485