hold open mod |
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golden24
Callahan's Auto Mag
Joined: 15 Feb 2019 Status: Offline Points: 505 |
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Topic: hold open modPosted: 13 Sep 2025 at 12:22pm |
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This mod came from Bruce Stark's brilliant brain ![]() ![]() both sides tapped, one 2-56 the other 1-64.
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Dances with AutoMags
Callahan's Auto Mag
Joined: 13 Oct 2011 Location: Valley Glen Status: Offline Points: 613 |
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Posted: 13 Sep 2025 at 4:47pm |
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I originally made this mod for the "Twisty" gun that Max and I developed. I had the EDM shop burn a hole in the hold-open pin but they burned the hole all the way through the pin.
The hold-open sheet metal fell off of the pin. I tapped both ends of the pin to hold a 2-56 Torx screw. The metal is pretty thin on the hold-open end of the pin, but I got it tapped ok. Steve used a 1-64 screw and it seems to work ok. This was done to salvage a hold-open and maybe make it easier to disassemble the gun. Except for the recoil-rods and the trigger adjustment screws, every screw on this gun is a Torx. It is still a work in progress.....Bruce |
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An armed society is a polite society.
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golden24
Callahan's Auto Mag
Joined: 15 Feb 2019 Status: Offline Points: 505 |
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Posted: 13 Sep 2025 at 5:29pm |
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WOW those are beautiful Bruce ! I originally made this mod for the "Twisty" gun that Max and I developed. I had the EDM shop burn a hole in the hold-open pin but they burned the hole all the way through the pin. The hold-open sheet metal fell off of the pin. I tapped both ends of the pin to hold a 2-56 Torx screw. The metal is pretty thin on the hold-open end of the pin, but I got it tapped ok. Steve used a 1-64 screw and it seems to work ok. This was done to salvage a hold-open and maybe make it easier to disassemble the gun. Except for the recoil-rods and the trigger adjustment screws, every screw on this gun is a Torx. It is still a work in progress.....Bruce |
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golden24
Callahan's Auto Mag
Joined: 15 Feb 2019 Status: Offline Points: 505 |
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Posted: 04 Oct 2025 at 11:22am |
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Another idea from the brilant brain of Bruce, 2-56 Titanium Pan Head Torx screw 1/4" dia. 1/4" thread length, low profile. No pocket modifications made. The site that has them, https://ticonnector.com/product/14-x-2-56-short-socket-head-screws/ |
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golden24
Callahan's Auto Mag
Joined: 15 Feb 2019 Status: Offline Points: 505 |
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Posted: 04 Oct 2025 at 11:22am |
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sorry for the crappy focus.....
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golden24
Callahan's Auto Mag
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Posted: 04 Oct 2025 at 11:23am |
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Dances with AutoMags
Callahan's Auto Mag
Joined: 13 Oct 2011 Location: Valley Glen Status: Offline Points: 613 |
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Posted: 05 Oct 2025 at 12:43am |
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That looks real good Steve !
You told me that you used a washer under the screw on the hold-open so that the screw rubs on the washer, instead of the frame, when the hold-open rotates. On another subject: Many of you already know this, but here I go anyway. The magazine-latch used on the Auto Mag is a direct copy of the 1911 design. Parts #57, 58 & 59. As many after-market parts are made for the 1911, you can easily pick-up an extended mag latch and install it into your Auto Mag. This is especially helpful if you use thick after-market grips. E-Bay has stainless steel versions with the lines on the button like the Auto Mag. Some fitting may be required and it is somewhat difficult to hold back the trigger-spring, part #40 while inserting the magazine latch. The one I bought did not come with the spring or the magazine-latch retainer, parts# 58 & 59, so I just cannibalised the parts from the old mag-latch. I wanted to use the stainless-steel Alan wrench retainer anyway. Cheers........Bruce
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golden24
Callahan's Auto Mag
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Posted: 05 Oct 2025 at 3:42am |
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Thanks Bruce
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