I put a higher ramp type front sight on my 4" M617-0 because it was shooting near a 8 inches high at 25 yards with a 6 o'clock hold. Now, they all stay in the black at 25 yards. I also have a M617-0 6" and a M617-2 6" and with no sight changes, they both shoot like a rifle. Good hits on cans over 50 yards, offhand. Big Larry