Jump to content
Brian Enos's Forums... Maku mozo!
barrysuperhawk

Salvaging a botched slide cut

Recommended Posts

I have a friend with a milling machine, and a poorly executed fast fire 3 cut on a glock slide that resulted in the sight being crooked.  Actually one of the mount holes is tapped wrong.

So.  I am not attached to the fast fire 3, but I would like to see if I can salvage the slide.  My first idea was to maybe find another mini red dot sight with a different enough mounting pattern that I could just drill and tap some new holes and be done...  

I have found the cross references showing which sights use the same set up but none of them are specific enough to tell me if the actual screw spacing is different enough to live on the same slide.  An additional benefit would be had if the new sight was physically larger than the fast fire 3, because the actual cut is also oversized, too.

Share this post


Link to post
Share on other sites

For some people it may help to post a picture of the slide to help get a better idea of the situation and be able to provide a better solution....

Share this post


Link to post
Share on other sites

Sure, I can post one tonight when I get home, but the actual problem is the sight is both off center, and angled to the left, to where if the dot is mechanically centered, it bears closer to the closer to the corner of the slide than the front sight hole.  Put another way, the tapped holes in the slide are not even with each other, the right side is closer to the front.

Share this post


Link to post
Share on other sites

If your mounting holes are tapped all fubar, I would extend the milled pocket forward or backward (depending on constraints from ejection port and rear sight) ~1/4" or so and redo the drill/tapping of holes.

Share this post


Link to post
Share on other sites

If the tapped holes are messed up, I would just drill and tap the existing holes for helicoils.

Share this post


Link to post
Share on other sites

Install screws with Red loctie, mill heads off flush and the drill / re-tap..

 

Share this post


Link to post
Share on other sites

I would tig weld the bad spots and remachine. If the holes are only off a little bit, plugging them with screws won't work. There will only be a sliver of screw left after re drilling, and that will fall off.  Helicoils would still be in the same wrong location. The over cut slot could be welded and recut. Remember - measure twice, cut once. Weld, repeat.

Share this post


Link to post
Share on other sites

Ok, if I can find a tig welder to weld up the hole(s), the replacement hole is going to overlap the old hole.  Am I going to have to worry about the weld being harder or softer than the base stainless (whatever lone wolf makes their SS slides out of)?

Share this post


Link to post
Share on other sites
3 hours ago, barrysuperhawk said:

Ok, if I can find a tig welder to weld up the hole(s), the replacement hole is going to overlap the old hole.  Am I going to have to worry about the weld being harder or softer than the base stainless (whatever lone wolf makes their SS slides out of)?

Tell the welder what you wanting to do he will know the right filler material to use.

Share this post


Link to post
Share on other sites

Make sure its clamped to a true table before welding to keep from warping the slide. 

Share this post


Link to post
Share on other sites

Barry, the vast majority of micro reflex sights are on a .550" hole spacing, regardless of the threads used.  If you are willing to have the sight sit a little higher than it would if properly milled, you can screw on a thin (1/8" adapter plate and thread that correctly.  Since your friend screwed up the first go round, I'd send the slide out to someone professional who does that for a living.  It is definitely possible to salvage the slide.

Share this post


Link to post
Share on other sites

Well that might not work very well, I've called two of the bigger players in the Glock slide cutting industry, such as it is, and explained to them what the problem is, and both of them declined to take on my project.  As annoying as it is I'm not blaming either one for not wanting to get in the middle of this. 

Here are pix of the Botch https://imgur.com/a/JSpYTE6

Share this post


Link to post
Share on other sites

Your friend owes you a new slide, that is a hack job and unfortunate, I'd go as far as cutting off the power cord to his mill. 

Share this post


Link to post
Share on other sites

Was this an actual mill, or a cross slide vice placed under a drill press?

Share this post


Link to post
Share on other sites

Yes an actual mill.  

 

The good news is that I found another friend with a tig and a mill, we welded up the holes and re tapped them straight.  Then, for good measure, we cleaned up the cuts a bit.  Its not perfect,  but its useable...

20200213_095628.jpg

20200213_095605.jpg

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...