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Discussion Starter · #1 · (Edited)
Warning: this is a long, picture intensive thread, please read and thanks for your help!

Caspian XR or Sig GSR1911

Recently a few members of a local firearms forum were able to pick up, for a steal, "seconds" 1911 frames/slides from caspian. These were over runs from the Sig GSR 1911 that caspian built for them.

The reasons these were seconds were purely cosmetic, such as an egged out firing pin retainer hole. However, that exact hole is where the problems start.

Back when sig was still doing GSR1911's with this hole, they had a manhole cover(as seen in part 47 of the following diagram on page 25: http://www.sigsauer.com/upFiles/CmsContent/documents/OwnerManual/GSR1911OM.pdf
)

We've looked high and low, but noone has the correct screw anymore. Not Sig. Not caspian.

Here is a quote of one member's VERY informative post about the screw:

other forum said:
So, here's what I found.

Supplied Allen Screw length:



Depth of hole in slide (as measured by my depth gauge):



Here's the suppplied allen screw bottomed out:





And here it is "flush":





Hope this helps!


Can anyone help to provide some idea as to where to find the correct screw? From our measurements it needs to be a .185 width head, .06 height head, 8/32 thread cut and either 1/4" or 5/16" long.

Any advice would be much appreciated!
 

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If you are only looking for the screw.... Fastenal has most everything. As far as what to make it work???????????? No idea......

I don't understand why SIG does not have them, replacement part for most people eventualy.......

Tony
 

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If the JB Weld doesn't work...... ;)
You'll probably have to buy a screw with the correct thread pitch, shorten the threaded portion if necessary and turn the head down to the correct diameter in a lathe.

Getting the correct dimensions from someone who has a "manhole cover" from Sig would help.
 

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Just depends on how picky you are. JB/Cerakote or get some of these and experiment -
http://www.grainger.com/Grainger/items/3H606?Pid=search

Turn/file the heads down to the correct diameter in a lathe. Washer(s) under the head to make it flush. You could lathe turn/file the head down to eliminate the socket for the wrench (if it is deep enough) and drill a couple holes for a spanner to work/look exactly like the SIG or fit it tight to the slide hole, use the high grade Loctite, and file it to blend and disappear.
Have fun.....
 
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