Just installed mine on my Winchester 1300 defender shotgun. Ive owned the gun for 15 years and it shoots great. My issue is I have been told that the way you sight it in is to put the front sight (ball) on the front edge of what im calling the chamber were the shells are put in. It must work because ive shot clays like this without issue. With the new stock on im unable to put that front sight on that edge. The stock is too tall so I have to drop my face to the side of the stock to get that same picture. I hope you can understand what im trying to say. What do I do now just adjust my sight picture? Im really dissapointed as this thing is not cheap and I cant stand when a aftermarket part doesnt fit the same as a factory part does. I feel for what it costs my sighting of the gun shouldnt be hampered. As allways thanks for any help.