Need help with dimensions


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gunboat57
June 9, 2014, 12:44 PM
I am mounting a receiver aperture sight on a Martini-Henry rifle. I plan to mount the sight (probably a Williams) to plate fastened to the side of the receiver. So, the centerline of the receiver will be about .75" away from the vertical face where the sight will attach.

Can someone recommend a sight with a flat base (like a Williams 5D 12-37) that will reach over .75" to the centerline and still have at least 1/8" windage adjustment L and R?

The Williams FP 71 fits the Win 71 and 86 etc. Can someone tell me how wide the Winchester receiver is? I'm trying to determine if the FP 71 would work.

By the way, the Martini-Henry receiver is 1.28" wide and my mounting plate on the left side is 1/8" thick, so the centerline is exactly .765" away from where the sight must mount.

Here's a pic of a Williams 5D 12-37 in place. It won't quite get over to the centerline and still have any adjustment left.

http://i127.photobucket.com/albums/p142/gunboat57/Martini-Henry%20MK%20IV/RS6-7-14B_zpscd3c63ed.jpg (http://s127.photobucket.com/user/gunboat57/media/Martini-Henry%20MK%20IV/RS6-7-14B_zpscd3c63ed.jpg.html)

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