I obtained this sight with a bunch of stuff I bought at a yard sale. Looks to me like a Ruger sight because the blade and the back look the same as a Blackhawk sight. This sight has a larger than 3/8" normal dovetail - the dovetail cut on this one measures .472"X 537" and the sight body itself is .700" wide. I'm thinking its for a rifle? Anybody know what it is for? Thx.