cajungueo:
yes it is a b square, and it is very easy to install. My mini is a non-ranch model so i have no place to install the scope rings, so i bought a b square. installation is easy but i had a few problems becuase the scope moves during firing so i used a pipe wrench to thight the side knob. It is reliable but expensive, paid $80 here in puerto rico for it.
i worked on the trigger job and istalled a muzzle brake and pistol grip stock. I tink it is a beauty and i am very happy with it.
saludos desde puerto rico!!!