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I know I've seen this before, but I'm looking for the size of the rail mounting screws on a MK III. #6-40?? How hard is it to drill these screws? Is the receiver hardened? I've got a Standard that I am thinking of putting a rail
on so I can attach a red dot scope. I've got a drill press.

Thanks,

Jeff

I believe you are correct on the 6-40 screw size.

As far as drilling a receiver I would not attempt it unless it was done in a endmill. Hard steel and SS have a tendency to cause the drill bits to walk. Beside trying to drill on a curved surface. Generally you will start with a center drill.

If you don't want to drill and tap the Wiegand rail has had good reports. Replaces the rear sight mount. The downside is you can't remove the optics and shoot the iron sights.

http://www.rimfiresports.com/merchant.m ... Code=VC2SM

No, those screws are 6-48tpi threads. You can get a rail & rail screws at Jack Weigand http://www.jackweigand.com/rm2fd.html

I wouldn't drill it with a drill press without using a mounting jig or some centerpoint twist drills.



http://www.midwayusa.com/viewProduct/?p ... ber=341035

R,
Bullseye

Thanks. Guess I'll skip the rail mount for now!!

jd66921 wrote:Thanks. Guess I'll skip the rail mount for now!!

OR take greener's advice and get the Weigand no drill mount. They work.

So, will that rail mentioned above fit on a standard MKIII? Is the sight
dovetail the same size as the other pistols? Does it work as advertised?
The current sight is just drifted out sideways?

Thanks,

Jeff

Yes, yes, and yes. Mount the receiver securely in a padded vise and drift out the rear fixed sight. The Weigand will mount to the dovetail and you'll be very happy with it.

R,
Bullseye

Thanks all! Looks like something to look at down the line a bit. I've got VQ
trigger and sear coming, so I don't want to totally confuse myself.

I appreciate all the good info I've collected here!!

Jeff