I could have sworn Colt made these for the older SP1 and Sporters that they sold, but I can not find one. I need a screw to attach a large hole lower to a small hole upper, but I need it with the larger diameter screw heads that cover the lower's pivot take down holes on both sides. Did Colt make one like this. I know I can buy the offset pin, but the ones I have seen fit inside the lower's pivot hole.

Any Ideas?

ASO544

The SP1’s and Sporters had both large hole uppers and lowers thus the large screw heads. Of the later small hole uppers I’ve purchased, Colt supplied them with the small offset pin.

I too am looking for the exact same type pin you described. They say the offset pin works fine, but I  would prefer to use the other kind. I have looked at many parts suppliers at gun shows and no one has them. If you ever find them please buy two and E-mail me,and I will buy one.