Well I do not know much about it, it is a type Ardesa inline, .50 caliber, I bought him to shoot balls .490 with patches lubricated although it would be appropriate to use current sabot projectiles. It is a lightweight and very pleasant to the touch weapon (I have not fired the rifle). I'm going to use with open sights at the moment because the budget does not allow me to put frames and visor. And a little more I can say. You know how I am, I will be years without firing the rifle. I'm Hunter shotgun and minor pieces lol.