Slot screws on the assembly. The rifle belonged to a friend that wanted it for the sights and ended up mounting a scope and rings. Fired 3 rounds and put it in the safe. Came with the black synthetic stock, and the rifle was spotlessly clean. He decided to move to a larger caliber and sold me this one. I just needed the action, so off came the barrel, stock and trigger group. Stock sold already and the trigger group breaks clean. All I can tell you, as I don't remember when he bought the rifle, but I think 2004, and it was an ADL.