Yes. I bought a 3000 with the folding stock some years back. After looking online for the answer to your question for years I broke down & tried it. Picked up a Synthetic Remington Police stock on ebay cheap last month.

On the end of the stock that fits into the receiver it's snug up & down. Side to side there is a little play but the trigger guard holds it pretty well & once the stock is tightened up it's solid. The outside surface of the stock fits the receiver perfectly.

I used a piece of 8mm threaded rod, 3 nuts & a large flat washer with the sides clipped off. Used one nut as a jamb nut to lock the rod to the receiver & the other two to hold the stock on & lock the second nut.

Did not like the side folder. Very unpleasant to shoot. Wish I'd done this years ago.

Jim