Slide stop with removeable pin

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Post by SmokinNJokin on 12/29/2018, 8:43 am

This year at nationals Chris M. showed me a slide stop on one of his guns with a pin (straight portion only) that could be removed and replaced with a larger diameter one as the barrel wears.

I was wondering if anyone else was familiar with this modification, would care to share pictures and explain. What gunsmiths perform this modification? I am curious and would like to educate myself, thought others might be interested.

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Post by Sc0 on 12/29/2018, 8:49 am

Not sure it would be effective since the holes in the frame wear at a different rate.

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Post by SmokinNJokin on 12/29/2018, 8:56 am

I think the wear of the holes in the frame (if the lower is quality steel and not an old usgi) is negligible compared to the wear of the contact surfaces of the barrel and lower lugs, slowly decreasing the pressure of the barrel against the slide stop. But I could be wrong. Hopefully the experts will chime in.

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Post by robert84010 on 12/29/2018, 9:24 am

Many gunsmiths do this. They build a jig that guides a narrow file in the middle of the pin only the ends stay at maximum diameter. Taking it down .194/.195 allows the pin to be replaced a couple of times before it reaches max diameter again. National Championships have been won with guns using this technique.

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Post by SmokinNJokin on 12/29/2018, 10:31 am

I'm familiar with the modification you are describing, what im talking about is specifically cutting the pin off of the slide stop portion (lever) and making the pin portion replaceable with a hardened steel insert. That way you are not replacing the entire slide stop, just the pin portion that wears. I don't think I'm doing a good job describing it, hopefully Chris will chime in eventually.

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Post by robert84010 on 12/29/2018, 11:57 am

sorry for my confusion. I see your title stated removable. That seems like a 'smith came up with their own method to reduce the pin size and achieve the same result as filing the pin only where the lugs rest.

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Post by Jon Eulette on 12/29/2018, 12:58 pm

Pachmayr made those slide stop pins for their pistols. I have one in a box. They used a C clip to retain it in the frame.
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Post by fc60 on 12/29/2018, 1:24 pm

Greetings Jon,

Unable to visualize how the Pachmayr stop is made.

Perhaps you could post a photo of it?

Cheers,

Dave
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Post by SmokinNJokin on 12/29/2018, 1:48 pm

Jon,
Please do post a photo, I'm intrigued. I'm curious what your opinion is on the concept as well.

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Post by Jon Eulette on 12/29/2018, 1:58 pm

I’ll dig it up later and post pics unless someone beats me to it.
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Post by jglenn21 on 12/29/2018, 2:27 pm

If memory serves think of a 2 piece slide stop like a 22 conversion. It was held in place by a C or E clip on the right hand side. Never owned a signature series 1911 but always lusted after one in the 70s..  they had some interesting features

A picture would be great Jon.
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Post by SmokinNJokin on 12/29/2018, 2:50 pm

I don’t understand why the c-clip would be necessary, doesnt the detent in the lever portion and the tab riding inside the slide prevent the whole assembly from walking out?

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Post by Jon Eulette on 12/29/2018, 2:55 pm

jglenn21 wrote:If memory serves think of a 2 piece slide stop like a 22 conversion. It was held in place by a C or E clip on the right hand side. Never owned a signature series 1911 but always lusted after one in the 70s..  they had some interesting features

A picture would be great Jon.
Jimmy is correct. The clip prevents the pin from backing out. On 22 conversions the recoil guide rod holds it in place when tightened so it cannot back out.
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Post by PhotoEscape on 12/29/2018, 3:03 pm

Is this a right one?  Question  It is a quiz, folks.  lol!  AP
Slide stop with removeable pin Tt33-ss_194_detail
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Post by Jon Eulette on 12/29/2018, 3:40 pm

Nope Wink
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Post by PhotoEscape on 12/29/2018, 3:50 pm

Well, of course, Jon is correct.  Pictured is slide stop from TT33, which is using elongated c-clip for locking.  I hope this one is the correct one, although it is for airgun
- Slide stop with removeable pin Elite-10AP
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Post by jglenn21 on 12/29/2018, 4:06 pm

Smokin   check out the marvel.22 conversion slide stop for non lock back slides.. 2 piece..
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Post by Jon Eulette on 12/29/2018, 8:26 pm

Took some serious digging.Slide stop with removeable pin 63cae810
Slide stop with removeable pin 17341610
Slide stop with removeable pin Ae334310
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Post by fc60 on 12/30/2018, 12:07 pm

Greetings Jon,

Thanks for digging and photographing the part.

It gives me some food for thought.

Cheers,

Dave
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Post by SmokinNJokin on 12/30/2018, 12:14 pm

Jon,
Thanks for sharing, interesting part.

I was thinking of 2 possible benefits to that style pin:
1) pin portion can roll as the gun cycles, spreading lower lug wear around it 360 degrees

2) pin portion can be easily replaced w/oversize, without needing entire slide stop pin (forged ones cost $50). Could save the lever portion, especially if it had cosmetic value (master blue, armory-kote or cerakote, etc) and replace the pin with a cheap piece of .200" tungsten carbide drill rod.

What do you think about the concept?

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Post by kc.crawford.7 on 12/30/2018, 12:19 pm

Reducing the diameter of the pin that makes contact with the bottom lugs is a great idea.  USMC has been doing that for years.  If you make a .195 pin for the entire length of the slide stop pin it's going to wobble around in the receiver on the right side where it comes through the receiver.  Need to keep the "major" diameter of the pin fitting the receiver correctly and then you can reduce the area that makes contact with the lower lugs.
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Post by robert84010 on 12/30/2018, 5:51 pm

Thanks KC. My 'smith learned the trick on your guys' armorer van at Perry. SSGT Goodman around '97/98, I think. Meidinger won it all that year. 

I'm still a little perplexed what problem this C-clip setup fixes, nobody has mentioned why this exists?

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Post by Jon Eulette on 12/30/2018, 6:25 pm

This exists because Pachmayr had a slide tightening device that mounted under the frame dust cover and used the slide stop pin for mounting. They are oversized and used a special wide link that was as wide as the bottom barrel lugs. Just another wY to build a gun.
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Post by jglenn21 on 12/30/2018, 8:30 pm

in it's day the Pachmayr Signature model was highly thought of and pretty pricey..

only picture I could find of one on the web. notice the slide tensioning piece pivots on the slide stop pin. Also had a unique barrel bushing if memory serves.. maybe like a Briley

http://www.lsbauctions.com/2096/pachmayr-signature-model-custom-accurized-45-acp-semi-auto-pistol-1911/


wide link Jon mentioned.

http://www.lsbauctions.com/2096/pachmayr-signature-model-custom-accurized-45-acp-semi-auto-pistol-1911/

always interesting to visit the many ways old smiths worked to find the right combination to accurise  the 1911
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Post by chopper on 12/30/2018, 10:41 pm

always interesting to visit the many ways old smiths worked to find the right combination to accurise  the 1911
  I'm impressed with the Clark Heavy Slide I bought this summer. Pretty unique idea with the adjustment screws to tighten the slide  and the tuner block to tighten the lockup. I got it working great now and I'm actually improving my scores with it.
 I'm also impressed with the trigger Wes Lorenz showed in the topic "what kind of trigger is this?" I think that could be refined into something very worthwhile.
Stan

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