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Old January 5th, 2020, 09:47 PM #1
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polymer 80 glock build help

so my first poly80 glock, done a handful of ar15's & 10's. hard to tell with the pics, but the rear trigger block and the poly80 rear block seem to be tilting up just a bit in the front. the trigger bar seems to be higher than in my oem glock. as a result, i have to really press down on the ejector for the slide to come all the way back (ie the ejector is blocking the slide coming back because it is sitting a little high/angled up).

it is very hard to rack. i think in part from the ejector rubbing on the bottom of the slide and the rear rails not being parallel to the front rails. i don't see the slide rubbing on the frame. the lower parts are an oem glock kit.

i've just emailed p80, but if you see anything obvious or have any suggestions, i would appreciate that info. thx, david
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Old January 5th, 2020, 09:50 PM #2
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Does it eject rounds? Does it not ride forward fully everytime when racked?
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Old January 5th, 2020, 10:34 PM #3
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haven't actually fired it yet. if i retract the slide all the way and let it go, it will go all the way forward. but if i walk the slide forward it will stop before going all the way forward. def binding, seems to be on rear rails and/or the ejector angled up/sitting a little too high.
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Old January 5th, 2020, 10:55 PM #4
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The few I have done have been stiff and need to be cycled several hundred times to for smooth action. I also run the slide guild rails on a diamond stone until all the coating is file off. It seems to cut down on the break in time.
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Old January 5th, 2020, 11:08 PM #5
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This may be a dumb question but did you lube the rails? Even for just testing the fit, it can make a hell of a difference.
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Old January 5th, 2020, 11:10 PM #6
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Quote:
Originally Posted by davsco View Post
haven't actually fired it yet. if i retract the slide all the way and let it go, it will go all the way forward. but if i walk the slide forward it will stop before going all the way forward. def binding, seems to be on rear rails and/or the ejector angled up/sitting a little too high.
I had the same problem. Pull all the way back and slide goes home. Walk it home, or dont pull back all the way and it hangs up 1/2" from going home.

I cycled by hand maybe 100 times and although improved, wasn't 100%. Test fire went similar on the first mag, some went home others didnt. I had to bump the back of the slide maybe 1/3 of the rounds. After 100 rounds or so, ran fine. Even ran 158gr one handed(limp wrist) fine.

You might find it will break in after 100 rounds or so.
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Old January 5th, 2020, 11:30 PM #7
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I recommend running it for a bit. My polymer80 G19 took about 100 rounds of fire, FTE / stovepipe, hand cycle.

It should break in nicely. Had my first FTE after maybe 2-3k rounds of wolf ammo after the break in.
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Old January 6th, 2020, 12:06 AM #8
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I've built a little over a dozen. Turn on your TV, find a good show and watch it while racking the slide over and over...all the way back and let it go forward...over and over...you will know when you're finished
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Old January 6th, 2020, 02:00 AM #9
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The ejector looks all right i think. Most likely the rails are super tight. Probably need some polishing and possibly a bit of sanding to get a good fit. And rack the heck out of it.
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Old January 6th, 2020, 06:43 AM #10
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I just finished one too. My striped slide would hang up a little around the rear rail when test racking as well. Once I finished the slide with the guide rod and spring it all felt normal to me.
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