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Old February 8th, 2020, 07:59 AM #1
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Poly80 Help - Slide/Frame Issue

OK, I've assembled two Poly80 PF940v2 pistols. The His and Her versions.

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I've assembled one previously. No issues. This time, I followed marinegunbuilder with his accent and his emphasis on first time quality, polishing all the pieces and aligning the holes.

Pistol 1, hers, the black pink combination, goes together easily. The slide goes on, racks, sets the trigger. No issues.

Pistol 2, the FDE, has an issue. The slide won't go on, stopping where shown. I believe I may need to take a little more material out of the channel. The slide does go onto the frame without the barrel or recoil spring.

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But it gets confusing. The FDE slide won't go onto the black frame. This tells me I have a FDE slide issue. It stops at the same place as the FDE/FDE.

The pink slide won't go onto the FDE frame. Different issue. It appears to go on until it gets to the rear rail. (And I really don't like this color combination.)

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So, here's the plan. I'm going to disassemble the FDE frame and slide. I'm going to remove some more material from the channel.

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Then I'm going to reassemble the pistol. I can try both the frame and slide with a Glock 22.

But does anyone have a thought on where the issue is? Is there anything I to which I should pay particular attention.

Thanks.
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Old February 8th, 2020, 08:35 AM #2
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Sorry no help. But where did the slides come from? Same place?
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Old February 8th, 2020, 08:41 AM #3
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Quote:
Originally Posted by CrabcakesAndFootball View Post
Sorry no help. But where did the slides come from? Same place?
Yes. US Patriot Armory.
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Old February 8th, 2020, 08:49 AM #4
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I think you should focus on the barrel channel in the frame and remove a little more material. Looks like the barrel and/or recoil spring may be contacting it and causing the issue.
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Old February 8th, 2020, 08:50 AM #5
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Almost looks like the slide safety plunger is stopping it from going back? But I cant tell from the pic.
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Old February 8th, 2020, 09:04 AM #6
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It's hard to tell from the pics but make sure your slide lock spring is fully seated and check your trigger bar, the trigger bar could be getting caught on the firing pin safety plunger.
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Old February 8th, 2020, 09:21 AM #7
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you can dissassemble the slide and pull the safety plunger out and see if that has any effect. The bar on the trigger that contacts the safety plunger on the poly 80 are notoriously high. I compared mine to my stock glock 17 and it was measureably high needing to be trimmed back and polished. My old V1 Poly 80 was so high that it was scraping the slide before even touching the plunger. figure out what you can pull off and test the slide movement to isolate the problem. There is always some variance due to manufacturing tolerances from sample to sample, even with the same brand/model item. so when one does not fit but the other does, can mean the contact is very slight and within the tolerance of machining. Some brands hold tighter tolerances than others so thus you have to do some "fitting". For my poly 80, I made sure to modify anything that did not work with my stock glock 17 gun.
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Old February 8th, 2020, 09:26 AM #8
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Take out the barrel & recoil unit, then try fitting again. That will determine if the recoil spring channel is the issue.
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Old February 8th, 2020, 09:31 AM #9
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1) Definitely take more material out of the channel. Polish it while you're at it.

2) Try swapping the safety plungers. See if that effects the pink slide going onto the black frame. That might tell you whether you have a FDE slide problem or just an out of spec safety plunger.

Another suggestion not necessarily dealing with your problem- disassemble both frames and put the rails back in. No guts, just the front and rear rails. Once you've done that, stand the frames on a very flat surface, rails down(granite counter tops are great for this). See how the bearing surfaces of the rails line up. Obviously, you want all four rails flat on the surface with no cants.
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Old February 8th, 2020, 01:24 PM #10
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UPDATE: Better, but not there yet.

1. Cleaned up the channel This helped a lot.
2. Took out the trigger group, front block, etc.Reinstalled.
3. Disassembled the slide. Removed and reinstalled the safety plunger. It does seem slightly higher than the good slide, but it seems to function properly.
4. The slide goes on all the way with the barrel and recoil spring removed.

But overall, it sticks at this point:

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And it sticks at this point with both slides. It feels like the rear rail is hitting something. I'm not sure.

Anybody near Annapolis who can take a look at this?

Unless someone suggests something else, my plan is to replace the safety plunger and spring. And swap the rear rail with one from a virgin kit.
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