if it is an slg 08 then it comes with a fixed (non adjustable) stove pipe feedneck with o rings in to hold the hopper in place, if that is the case then i would recomend buying an aftermarket one that has a locking lever so that it fits your hopper, the threads the slg needs will be called dye threads
its a bit old but this is the most helpfull vid ive found on the 08 SLG:
hope this helps
Ryan, team domination