The stock is a uncommon early factory Ruger *Tiger Stripe* birch wood that has been opened up to accept the .920 barrel. If you search *Ruger tiger stripe* you can find more information on them. Barrel is not threaded.
Hello Ben,
Unsure of round count but barrel looks great. Trigger, unsure of manufacture but its not factory. It is however a metal trigger group that is extremely smooth and crisp. I’d prefer to sell the scope with rifle.