I used to have one of those that I kept around as a "camp gun". One morning one of my bow hunting buddies looked out the window and told me that the Viet Cong groundhog that had been tearing up the horse pasture was up out of his hole in the ground feeding.
He was over a hundred yards from my camp, so I didn't use my bow on him. I grabbed the SKS in the corner and shot him, but the shot only wounded him, and he was obviously still alive.
I walked over to where he was, and it was clear I had to finish the job and end his suffering. Only problem was, I'd only put one round in the gun when I took my shot.
So I flipped out the folding bayonet and used that. Only time I ever used the bayonet. It worked.