can anyone tell me anything about the marlin 200? i already know a little, but would like to know more. like , is it an sb1 reciever? very light gun. never fired it in the 1 1/2 years i've had it and really not sure what to do with it. bought it on a whim. it looks unfired and is in new shape, just dont have a purpose for it. thought about maybe trading for a rifle barrel setup. any knowledge would be greatly appreciated