[Gerryy1]

I have been taking care to clean and lube my Tisas 1911 US Army after each trip to the range. It has performed amazing well and I now have about 400 rounds of 230g FMJ through it. After my last range trip I found this wear along the aft end of the slide on either side of the relief. Is this normal? Maybe from the hammer as the slide cycles? Any need to worry? See photos.

Thanks for any comments.

 

[Levian]

You mean on either side of the relief for the disconnector? Kinda looks like the hammer is scrubbing that area ever so slightly. I don't think I'd lose any sleep over it though as long as it isn't causing any cycling problems. Try leaving the barrel and recoil spring out and cycle the slide slowly by hand, see if you can feel any significant binding. If not, shoot & enjoy. If there's binding, then consider gently filing or sanding the high spot (if it's the hammer I'd suggest working that rather than the slide).

 

[frogfurr]

It's the finish wearing off. As long as you can't feel a burr no harm has come to the metal.

 

[Gerryy1]

You mean on either side of the relief for the disconnector? Kinda looks like the hammer is scrubbing that area ever so slightly. I don't think I'd lose any sleep over it though as long as it isn't causing any cycling problems. Try leaving the barrel and recoil spring out and cycle the slide slowly by hand, see if you can feel any significant binding. If not, shoot & enjoy. If there's binding, then consider gently filing or sanding the high spot (if it's the hammer I'd suggest working that rather than the slide).

Thanks, I’m going to keep an eye on it. Also sent pics to Tisas USA. Hope they reply.
Gerry

 

[nogoodnamesleft]

It’s your hammer. The top of the hammer is rounded and the wear will continue as you shoot it more. Replace the hammer.

My tisas did exactly the same thing. I replaced the hammer with a wide spur hammer from Auto Ordnance for something like $50 and it was a drop in, but your thumb safety might have to be replaced or refit.

 

[nogoodnamesleft]

AO1911 Hammer

 

[Gerryy1]

AO1911 Hammer

Thanks! Looks good and a good price.

 

[ether]

I wouldn't call it "normal", but as long as it works, I'd just call it "wearing in" and keep shooting

 

[Gerryy1]

I wouldn't call it "normal", but as long as it works, I'd just call it "wearing in" and keep shooting

Thanks. Yes so far works flawless, better than others 1911s I’ve had the opportunity to shoot.

 

[nogoodnamesleft]

It's the finish wearing off. As long as you can't feel a burr no harm has come to the metal.

That’s not finish wear, it’s actually gouging the metal on both sides of the disconnector slot. It will continue.

 

[nogoodnamesleft]

Here’s pics of my slide’s damage and the profile of the AO hammer that replaced the original.

 

[Gerryy1]

Yes. Similar to mine. Exceprlt the firing pin safety.

 

[BBBBill]

You can reprofile the top of your hammer to mitigate that. No need to buy a new one.

 

[Gerryy1]

You can reprofile the top of your hammer to mitigate that. No need to buy a new one.

That sounds good. What’s involved?

 

[Levian]

Carefully file the area of the hammer that has witness marks from the slide contact until the scrubbing stops. Just enough to stop it from scrubbing. Like I did here:

I replaced the grip safety, and the new safety didn't have quite as deep a dish for the hammer's spur and it made the slide hang. Instead of getting a new hammer, some judicious filing made enough clearance for the slide to work smoothly.

 

[Gerryy1]

Carefully file the area of the hammer that has witness marks from the slide contact until the scrubbing stops. Just enough to stop it from scrubbing. Like I did here:

Thanks for the tips
Gerry
View attachment 642999

I replaced the grip safety, and the new safety didn't have quite as deep a dish for the hammer's spur and it made the slide hang. Instead of getting a new hammer, some judicious filing made enough clearance for the slide to work smoothly.

 

[nogoodnamesleft]

If you’re going to file the existing hammer, the cross section of the hammer that touches the disconnector rail must be flat and square to cover the whole rail width with full contact.
Or buy the AO hammer for $15 plus shipping. Good luck 👍