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.
  3. CLICK Change User Flair
  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 17h ago

This thing shoots so flat 😍

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39 Upvotes

r/polymer80 9h ago

Geisler defense Slide issue

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2 Upvotes

This is my first geisler defense build & Ive been working on it for a few days now. For some reason when go to rack it that slide locks in place ( without the slide release). I have all pins in correctly & Ive shaved the lower good so i don’t understand the issue can anyone help? ( i have pictures of the internals as well)


r/polymer80 19h ago

now shes a 23

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14 Upvotes

r/polymer80 1d ago

Dead trigger

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8 Upvotes

r/polymer80 1d ago

Steel city arsenal Magwell + Magazine extension compatibility

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3 Upvotes

Recently added a steel city arsenal magwell to my pf940c and overall the ergonomics are incredible, changes the entire grip feel but in a more secure/stable way. I’m curious what magazine extensions work with it, I’ve been between purchasing the Glock Store extensions or the Sheild Arms extensions. My main concern is the top ridge / lips of the magazine extension blocking the magazine from being inserted fully due to hitting the magwell. If anyone has a similar set up and any advice I’d love to hear it.


r/polymer80 1d ago

where to buy 80% frames/AR receivers aside front mas defense??!!!

0 Upvotes

r/polymer80 3d ago

Is this savable, Pin bent and shifted upwards in the frame but it was barley even in

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13 Upvotes

r/polymer80 3d ago

Next build?

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34 Upvotes

So I just finished building this 3d 26 a few days ago, finished my p80 17 2 months ago. I live Ina state where 3d printing/ghost guns/built guns arnt banned, so any build suggestions??


r/polymer80 4d ago

76% lower came with the wrong locking block.

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17 Upvotes

The front locking block that came with my 76% is too big. It looks like its for a 17. Any recs on where I can find one? Ive never used the slit ones.


r/polymer80 4d ago

Another 22 Build

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12 Upvotes

r/polymer80 3d ago

Geisler Defense 19x Rear Rails

1 Upvotes

So I’m looking into grabbing a Geisler Defense frame, but most people say the front rails sit really high. Then I see other people’s builds, and everything looks nice and flush. Is it just hit or miss, or is there something people do to make them fit?


r/polymer80 4d ago

My Glocks

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35 Upvotes

1 Glock 2 Glonks (p80 76% and 3Dp p80)


r/polymer80 3d ago

Ghostgunjigs

1 Upvotes

IS Ghostgunjigs legit because I ordered the jig and I accidentally forgot to put building name and I sent a email telling them that a couple hours ago and I still nvr got a response?


r/polymer80 5d ago

$104 Million Verdict Awarded Against Husky Armory

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apnews.com
37 Upvotes

r/polymer80 5d ago

tip for building 76% frames with split rear rail modules!

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10 Upvotes

when removing material from the cavity that the trigger housing goes in, make sure to remove material until the RRM and trigger housing is easy to insert and remove from the cavity. if the cavity is too tight, it could cause the connector spring to be compressed, leading to trigger reset failures.

this doesnt happen with one-piece RRMs because its impossible to fit the RRM in until more than enough material has been removed, ensuring enough space is always available with builds utilizing them!


r/polymer80 5d ago

Brother botched a p80 build (actual 80 not 76) . He gave it to me for free and said if I can fix it I can have it .. he used a dremel and a crappy fine bit . Is this frame at all salvageable in any way or is it done for ?

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15 Upvotes

As stated my brother totally screwed up this p 80 build and told me I can have it if I can fix it .. is there a way to Jb weld and redo this or is it trash? I told him to put the tools down because to me it looks like he totally screwed it .. any way it’s fixable ? I’d love to make it usable even if it doesn’t look pretty .. any help appreciated


r/polymer80 5d ago

Made this one a few years back

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44 Upvotes

I would probably go a different route if I were to build another. thoughts?


r/polymer80 5d ago

1k rounds

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8 Upvotes

shooting just fine . the p80 im using is mine that i built just like all of you .


r/polymer80 6d ago

Peanut buttter sammich 26L

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79 Upvotes

r/polymer80 6d ago

P80 26L

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25 Upvotes

Dagger slide with dust cover, 17 round mag with a +5 extension.


r/polymer80 6d ago

Geisler takedown lever shim?

2 Upvotes

Guys I looked it up, but couldn't find any info. How do I shim my takedown lever on geisler gen 2?

Just found out today after bending and polishing my rear rails that when I dry fire my slide releases, meaning I'm having takedown lever issues...

I seen something in here about shimming the takedown lever, but couldn't find any info on how to do it properly.


r/polymer80 6d ago

Need Troubleshooting Assistance With Build

1 Upvotes

Hi, I have a recently built PF940v2 with all OE Glock internals, a Faxon barrel and a Brownell’s optic cut slide. The pistol operates fine and then the slide locks as though the mag is empty. The problem is the mag is not empty, furthermore the trigger seems to fail to reset during these failures. Once I release the slide lock a new round is chambered and the pistol will fire. Any ideas as to what is going on?


r/polymer80 7d ago

Peanut Butter Jelly Time!!!

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87 Upvotes

This slide is from my peanut butter geisler, but I got a jelly themed slide coming in the mail soon... Stay posted!


r/polymer80 7d ago

Constant jamming after 1 round! Failed ejection, sometimes ejecting to left side.

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16 Upvotes

GST-9. Please see all of my pics. I polished my ramp and sides. Most I ever got was 3 rounds out of it. I never tried another magazine yet though. Tried 2 different kinds of ammo. Doesn’t lock back after last round, but it’ll lock back with an empty magazine. Any help please? Driving me nuts! Thanks all!