Was on a 34" MX-8 Perazzi. The rib is 28" long and 3/4 inches high at the back. I've only had this rib about two weeks and was on the gun for about 4 days. Decided I didn't like it, my loss is your gain. Paid $500 for the rib, will sell for $225. There's a good chance I'll be at the Kentucky Sate Shoot and definitely at the Wisconsin State Shoot if it hasn't sold by then. Stick's on with two-sided tape.