Slide stop....

[dap]

I have been tinkering with 1911s for 20 years now and have ran into something I’m unfamiliar with. Long story made short; dog ran off with slide stop from a new STI single stack USPSA model. Ordered a new slide stop. After installing new stop I noticed a slight “bump” when the slide is about 1/8 of an inch out of battery. This doesn’t stop it frfom going into battery and can only be felt when moving the slide in and out of battery by hand. I found the old slide stop and after installing it I found this doesn’t happen. Reinstalled the new stop and the same problem again. Its not a big deal I can just use the original but it drives me crazy not knowing what’s happening. Could the lower lugs be dragging on the slide stop pin just before lock up?

 

[dap]

???

eight people look at this post and no one knows whats this is?

 

[rcmodel]

Color the slide stop with a black magic marker and cycle it a couple of times.

If it's dragging, the ink will be buffed off.

It seems unlikely the new slide stop is enough bigger to cause that much drag and still fit in the hole in the frame.

Maybe it is bent/warped slightly?

Maybe you need to shoot it a little and let it break in to the gun?

rc

 

[dap]

I'll try that tonight...i also installed the stop out of one of my springfields and i felt the "bump" with that one also...thanks for replying.

 

[MattTheHat]

If the fit is a bit tight, you could squirt a little bit of Remington 40X bore cleaner in the barrel link hole and work it around a bit. You could even then assembly the pistol, remove the mag and just rack the slide back and forth a couple dozen times. Just make sure you go back and clean out the bore cleaner.

I'll bet you find the problem goes away on its own, though, after a few dozen rounds.


-Matt

 

[rcmodel]

Well heres the thing.

Your old slide stops are broke in to the the barrel lug feet, and are likely very highly burnished where the contact is.

The new slide stop likely has a rougher parkerized or blued finish that has microscopic roughness still on it.

I'd grease it and shoot it and see if it goes away.

rc

 

[Jolly Rogers]

There are several diameters available in the slide stop cross pins. The two could be up to .003" difference in diameter. This could conceivably cause a drag on the radius portion of the barrel lower lugs. Color the curved lugs on the front of the barrel feet (where the link swings) with a Sharpie and reinstall the new SS and cycle the action. Field strip and look for where the Sharpie is worn off.
If the barrel feet hit the cross pin a few strokes with a fine file on the feet where the ink was removed can eliminate the interference.

Joe

 

[dap]

thanks

thanks all of that makes sense...ill try all of that!

 

[rcmodel]

I would not file/fit the barrel lugs to a new slide stop just yet.

If you plan to continue using the original slide stop, they must fit it just fine.

Filing them to fit an oversize slide stop before it is needed to tighten up the lock-up later would not be a wise move now.

rc

 

[dap]

i should have said ill do everything except remove material from the lower lugs....

 

[Jim Watson]

Since you found the original, use it.
Keep the oversize replacement. Maybe one day you will wear the link lug enough to need it.

 

[rmfnla]

Exactly.

It ain't broke no more so you no longer have to fix it!