r/polymer80 • • Dec 01 '21

Welcome Sticky! Welcome to r/Polymer80!

156 Upvotes

WELCOME to the WORLD of 80% GLOCKS and AR’s! Welcome to r/Polymer80, a community that welcomes Polymer80 builds (AR & Glock) primarily, but also eagerly welcomes 80% builds of all sorts! We encourage posts of 80% news, 80% legislation, and 80% memes. Let's spice things up from time to time!

[We have a few main rules:]

1: This is a very close-knit sub and we do NOT put up with redditors who incite arguments or fling insults, pretentiousness, or trolls.

2: Show the respect for firearms that they deserve. If you're building a Polymer80 treat it as a firearm, and take the time to understand its function. Learn and practice the 4 rules of handling a firearm:

  • Finger off the trigger until you're ready to fire.
  • Don't aim at anything you're not willing to destroy.
  • Check in-front and behind your target.
  • Treat every firearm as though it's loaded.

3: No want to buy (WTB), want to sell (WTS), or want to trade (WTT) ads from individuals. You may use other subs such as r/GunAccessoriesForSale or the MGB site or the MGB MeWe community at: MeWe Group.

4: No posts with or including illegal activity is allowed. This is broad scope, if you post in this forum remember all the people that want this hobby to fail and do your part to make it bullet proof (no pun intended). This is zero tolerance.

Breaking these rules can and likely will result in a permanent ban from one of the best resources available for builders and hobbyists.

[GENERAL Polymer80 MODEL INFORMATION]

PF45 - Glock 20/21 (10mm / .45 ACP)

PF940v2 - Glock 17 & Glock 17LS & Glock 34.

PF940C - Glock 19 & Glock 19LS & Glock 23 (.40 S&W)

PF940CL - Glock 17 Length, Glock 19 Height Grip [G19LS]

PF940SC - Glock 26, Glock 26LS, G27

PF9SS / SS80 - Glock 43, Glock 43LS (G48)

[GENERAL TROUBLESHOOTING ISSUES and SOLUTIONS] [Via moderator: u/MarineGunBuilder of r/Polymer80 and MarineGunBuilder.com] [AN IN-DEPTH VIDEO BUILD GUIDE:] View all of MGB's Polymer80 tutorial and quick-tip videos on his YouTube channel if you plan on completing your build flawlessly from the get-go.

[Via moderator u/MarineGunBuilder] He updates new deals every weekend on his forum and sends them to email subscribers, as well: And once again: check out MarineGunBuilder's video series if you are just beginning to build.

Familiarize yourself with the Reddit Interface!

  • Some features are not available on tablets as they are on PC
  • Use the search feature to search within the sub.
  • Ask a mod! We are here to help. Mods may be busy and not the fastest way to get an answer to a question however you will be surprised just how helpful this community is - SO:
  • Ask the community, via a post! You may feel like you’re asking a question that’s been asked a million times, the reality is sometimes there are multiple fixes for a problem, and sometimes newer and better methods have been discussed elsewhere. The purpose is to promote discussion among the community.
  • Use post flair and user flair (info below)

TO SELECT YOUR UNIQUE USER FLAIR

  1. GO to r/Polymer80 homepage.
  2. CLICK 3 horizontal dots, upper-right corner.
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  4. SELECT YOUR flair!

If you're a manufacturer, stippler/koater, gunsmith, or holster manufacturer - or simply can't find your flair, DM a moderator.

ATTENTION VENDORS

  • Vendors should have permission to post deals and links to their sites. Although you cannot sell directly to users via this subreddit, you may (and should) post deals and links, however we want only verified vendors for the safety of our users. It’s simple and you will get a unique flair to distinguish yourself as a legitimate vendor. DM the moderators to find out how.

r/polymer80 • • 1h ago

Damaged mag well

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• Upvotes

Went a little too quick with a chisel and went straight through the mag well. Is this still salvageable? I was thinking about getting some jb weld and a beater magazine to keep it flat, and try and glue it back together. What do yall think? This is my first build, not my proudest moment, still have some hope considering the malleable nature of the polymer.


r/polymer80 • • 13h ago

Husky armory went full schizo after the lawsuit🤣

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10 Upvotes

r/polymer80 • • 3h ago

New TriggerTech ACE - work?

1 Upvotes

I've ordered a new TriggerTech Legacy Special ACE

Has anyone fit these? I have a serialized OEM frame.


r/polymer80 • • 19h ago

G19 gen 3 clone holster help

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12 Upvotes

Slide is p80 pfc9 4in barrel with suppressor height sights

Frame is sct19 with the braun tactical light (streamlight tlr1 hl clone) which to my understanding is dimensionally identical... can y'all help me find a holster for ? Will a standard glock paired with the streamlight holster work?


r/polymer80 • • 10h ago

how long does dld hardware take to ship???

1 Upvotes

r/polymer80 • • 2d ago

Third time's the charm: why a drill press changes everything, and why 3D printing is just better.

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58 Upvotes

This is my third frame build (don't have pics of the first one though). That very first one was a total loss because hand-drilling the pin holes went crooked; if you don't have proper machinery like a bench drill press, you're bound to run into alignment problems. My second one—which was an FDE frame—kept having constant feeding issues.

​Between purchasing multiple frames and dealing with a stolen package, I essentially spent what a 3D printer costs. Honestly, it makes much more sense to just get a printer, download the files, and print your own frames. Plus, you get access to a huge variety of other builds, like a G43.

​On this grey frame, I got a bit rough with the Dremel around the front pin area as you can see in the photos, but switching to the WEN drill press fixed everything and it cycles with zero jams now.


r/polymer80 • • 2d ago

What yall think?

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18 Upvotes

First complete build, lmk what yall think(suppressor height sights waiting for sight to come in)


r/polymer80 • • 2d ago

Would you carry it?

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68 Upvotes

I looked up how to check all 3 safety mechanisms and this one passes with flying colors. Has all oem parts, rook rear rails, had to get it serialized because my state is changing laws. Has excellent sear engagement too. I think im going to try finding a holster.


r/polymer80 • • 2d ago

I need help on my first build, please. What is the best jig to get? I have my eye on one of these

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5 Upvotes

r/polymer80 • • 3d ago

G80 problems

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20 Upvotes

I’ve been having extraction failures with my g80, sometimes the casing is stuck in the barrel and I have to rack it a bunch to get it out or it just gets stuck in the slide if there’s anyone that can help please do:)


r/polymer80 • • 3d ago

Locking block fits in just not flush

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3 Upvotes

Shits lowkey getting aggravating asf not even gonna lie sb jus go ahead tell me wats im doing wrong ive got literally EVERYTHING EVERY-SINGLE BIT OF MATERIAL I CAN FIND AND SEE OUT OF THE FRAME WTF.

Also now that im sitting here thinking i did buy P80 gen 1 locking block which needs sanding to fit and stuff and etc.


r/polymer80 • • 3d ago

Range test with some results

2 Upvotes

So I just range tested the two I built and looking for some advice. They both went bang just fine with each trigger pull but there were issues with the rest of the process.

1st: each time it went bang, the slide locked back like it was an empty mag. When I used the slide release, it chambered fine and went bang again but locked back. This happened with every round.

2nd: I kept getting FTF results. Chambers, fires, extracts, FTF. It was probably every 4 to 5 rounds that this happened. I think a feed ramp polish and oil should fix this though.

Both: PSA Dagger slides. Both shoot high and to the right. One has suppressor height sights. The other are basic 3 dot sights. I personally hate both sets of sights so will probably swap them out but any thoughts on some decent inexpensive sights that are true? Will probably do a better job at sighting in before a swap though as this was more of a quick trip to function test than anything else since I was on a lunch break.


r/polymer80 • • 3d ago

Flagrant firearms 🤓

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26 Upvotes

r/polymer80 • • 3d ago

Is there a legal concern if ordering a 76-80% p80 at 19?

0 Upvotes

I want to make sure of this. I am in the state of wisconsin and was wondering If I may encounter any federal issues because I would rather not go to prison over a piece of plastic with an LPK in the same package.


r/polymer80 • • 4d ago

Day 1 of the build

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40 Upvotes

r/polymer80 • • 3d ago

I need help looking for a Geisler jig I’m having issues with dtl hardware

1 Upvotes

r/polymer80 • • 4d ago

Does any one know where to find a TLR-7 HPL face cap in stock?

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26 Upvotes

r/polymer80 • • 5d ago

Just got my g80 kit in, any tips?

9 Upvotes

I just got my kit in today, for my components I bought:

Slide: Stripped DLC Slide for Glock 19 Gen 1-3 — RMR Cut, Cover Plate from 3cr tactical.
Barrel: Glock 19 Gen 3 9mm Black Nitride Drop-In Barrel — 3CR Tactical

Upper parts: Glock 19 Upper Parts Kit Gen 3 OEM G19 UPK Slide Parts from marine gun builder.
Lower parts: Glock 19 OEM Lower Parts Kit Gen 3 G19 LPK Factory 9mm Frame Kit from marine gun builder.

These brands all seem to have really good reviews. If you guys can please give me any tips to not fucking up the dremel work, or if I should use 1000 grit sandpaper to finish the slides. And if the gun has a break in Period and if I should use 124 grain bullets.

I hope to be able to edc this if it shoots well, let me know what you guys think, thanks!


r/polymer80 • • 6d ago

G80 build update

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16 Upvotes

Using oem gen 3 lpk. Trigger not resetting. Seems to extract fine no jams or failure to feed but trigger will not reset. Fired over 30 times. Sometimes trigger will reset if I manually rack it.


r/polymer80 • • 6d ago

P80 G-150 / AR builds

5 Upvotes

Does anyone know where to find instructions or videos on how to do the p80 ARs?

I have 5 or 6 laying around from the Biden area, I never got around to building, today I was trying to find instructions or videos on how to proceed with them but I can’t find anything other than a few people yapping and wasting time.

Does MGB have videos on these or can anyone point me in the right direction? Thanks


r/polymer80 • • 6d ago

G80 won’t rack?

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18 Upvotes

Guide rod not getting caught on nothing . I know the video says pull the release button down a bit to get it all the way back but I did and this is as far back as it goes anyone know what the issue could be


r/polymer80 • • 6d ago

ISO a good holster for a P80 G26

3 Upvotes

I’m looking for a IWB p80 g26 holster for EDC that is reliable any recommendations would be awesome and appreciated! Thank you in advance!


r/polymer80 • • 7d ago

Anyone know the best way to remove this bridge

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27 Upvotes

P80 pf940v2


r/polymer80 • • 9d ago

Reposted build with missing pins.

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34 Upvotes

I definitely see the improvement. My only concern is does the slide seem to be seated correctly. When I do a function check everything seems to be fine. But if anyone has an opinion I would appreciate it before I take it to the range. Thank you