They are sturdy, windage adjustable shallow V with a rounded bottom set in a short express base (Recknaler, same as on the Steyr Classic ). The front is a Recknaler, also, a sharp square blade which can be quickly adjusted for elevation.
I have these on a Steyr 7x64, on a Sauer .308, and the rear sight was on a .375 H&H Model 70 Express which had a different front sight ( ivory bead in a hood ). I put this rear sight on my vintage 8x60S Mauser. They are very fast to line up, yet offer enough precision to shoot MOA or better.