quote:

Originally posted by Tebsinar:
The 98A bolt peep sight for my model 71 was removed and later lost by the rifle's previous owner.
I could have bought an after market copy. The current quoted cost is over $350.
I believe that I am not the only guy that needs to replace a sight or a part of the sight and the logical solution seemed to be to document the sight design so people would have a make or buy option.
I had great hesitations about creating the drawings. Reverse engineering is always a challenge and this certainly was also. I began my efforts with the honerable intention to complete the reverse engineering and then share the drawings via the forum.
What I found was that I had to pay just to borrow a factory part in order to make measurments. I also had to beg a number of folks just for pictures that were high enough quality that I could print them. The pictures were needed for parts that no-one would loan me, so I used the high resolution pictures and a set of instruments, and by translation and ratios, was able to come up with the additional design dimensions. I then went through a fabrication process and made a few mistakes before finalizing the dimensions and documenting appropriate fabrication techniques.
Well, after more than 75 hours of work I completed the effort and now have a set of design drawings. The drwaings document the sight base, Aperture/Windage Piece, Aperture, Screws, etc. as well as fabrication tricks.
With that much effort invested, I hope to share my designs, but also hope folks can understand my hesitation to give the drawings away.

Anyone interested in copies of the drwings can PM me at:
Robert.Nisbet1@US.Army.MiL
Anyone needing to discuss the design is welcome to call me (256-876-1939).
Thanks,
Bob Nisbet