Tag Archives: PF940C

The Best Step-By-Step Book For Building a Glock-Style Pistol With a Polymer80 Frame

This is a really valuable book I had both it (the Kindle version) and the Polymer80 step-by-step guide open for every step I did.

The book’s author steps you through everything with very good illustrations to boot.  Combine this with the guidance from Polymer80 and you are going to be very well armed to enjoy building a reliable Glock-style pistol.

Polymer80 Glock Build Troubleshooting

If you haven’t heard about Polymer80, they make a number of 80% receivers including some remarkable Glock compatible frames. Now they aren’t just a cheap gimmick – I like the grip angle, the texture and the finger relief that all result in a far better feeling pistol than an actual Glock in my opinion. Now there are haters that say these are not Glocks – that’s fine, they aren’t. Then again, it’s not like we all buy ARs only made by Colt or Armalite either in comparison.

So I have been posting about how to do the builds [Click here for a Glock 17 using the PF940V2 frame post and here for one on Glock 19 using the PF940C frame post]. They are very straight forward, fun and can generate a reliable pistol. Like all things, there can be challenges and troubleshooting your build to understand why the slide is binding, the trigger isn’t resetting and so forth are all things that may happen. Luckily, there are also lots of videos and posts for understanding how to solve the challenges.

Be Sure to Read the Instructions First

I do recommend you read the instructions from Polymer80 before you do your build. If you didn’t read them and are now having challenges, I would recommend you go back and read the good instruction file they wrote and watch the video:

Troubleshooting Videos



Also, Pew Pew Tactical did a nice series of posts on building and troubleshooting Polymer80 builds. Click here to open a new tab and go there.

My Take On Common Issues

  • The slide doesn’t go all the way back: Check that the recoil spring is not catching on the channel you needed to mill out. Check that the slide stop spring is sitting flush and not catching on the spring. Sometimes plastic falls into that channel and keeps it from fully seating. (It would be a good idea to blow your frame out with compressed air to get all the loose plastic out).
  • Trigger not resetting – this is either an issue with how Polymer80 did some of the Rear Rail Modules (RRMs) or how the frame was drilled causing the RRM to move. If this happens, you will need to file a bit off the right side (when looking down at the receiver) of the RRM so the trigger bar doesn’t hit it. I’d also recommend checking that there aren’t burs/machining imperfections on any of the trigger’s metal parts that might cause binding.
  • Slide not cycling smoothly – The rail modules should be equal height. Again, there may have been an issue with drilling causing an alignment issue. See if you can bend/adjust the rail modules so they line up.
  • Trigger feels gritty – remove the trigger and polish all metal surfaces. Blow out the pistol and trigger areas to ensure there isn’t any plastic debris. Expect it to take a couple hundred rounds to smooth out.
  • Action feels gritting – again, polish everything. I like the small rubberized polishing bits for the Dremel as well as working with sandpaper up to 2000 grit. Always remember that your goal is to smooth and polish, not to remove a ton of material.

So, I hope this helps you out. Polymer80 Glock frames are well engineered and do work. There may be some issues you need to work through due to how you build the pistol and the parts you use but view overcoming them as part of your journey and don’t give up. The end result is definitely work it.


If you find this post useful, please either buy something using one of the links to eBay and Amazon. With Amazon, if you click on one of our links and then buy something else – even unrelated stuff like clothes, electronics and groceries – we get credit and it would be hugely appreciated. Doing something like the above will help us fund continued development of the blog.


Please note that any images shown were extracted from the videos and remain the property of their respective owner(s).


Polymer 80 Frame PF940 FDE

$130.00
End Date: Saturday Jun-22-2019 14:09:31 PDT
Buy It Now for only: $130.00
Buy It Now | Add to watch list

Glock 17 Gen 3 Slide Upper Complete OEM For Polymer 80 G17 Gen3 Glock Factory

$419.00
End Date: Tuesday May-28-2019 15:49:56 PDT
Buy It Now for only: $419.00
Buy It Now | Add to watch list

Stainless Glock 34 Gen 3 Slide Window Cut Zev Compatible Fits P80/Polymer 80

$249.99
End Date: Wednesday Jun-12-2019 6:47:31 PDT
Buy It Now for only: $249.99
Buy It Now | Add to watch list

Glock 19 Gen 3 Lower Parts Kit OEM Factory PF940C G19 80 Polymer80

$51.99
End Date: Friday May-31-2019 8:50:45 PDT
Buy It Now for only: $51.99
Buy It Now | Add to watch list

Glock 19 Gen 3 Slide Upper Complete OEM For Polymer 80 G19 Gen3 Glock Factory

$419.00
End Date: Monday Jun-17-2019 15:19:25 PDT
Buy It Now for only: $419.00
Buy It Now | Add to watch list

Steel City Arsenal [UltraLight] slide for Glock 26 gen 3/4 or Polymer 80 PF940SC

$279.99
End Date: Thursday Jun-20-2019 15:42:03 PDT
Buy It Now for only: $279.99
Buy It Now | Add to watch list

Glock 26 Gen 3-4 Slide Upper Barrel Glock OEM G26 Gen4 Polymer80 PF940SC

$429.00
End Date: Monday Jun-17-2019 5:53:03 PDT
Buy It Now for only: $429.00
Buy It Now | Add to watch list

CUSTOM SLIDE | STAINLESS STEEL BLACK CERAKOTE - FOR GLOCK 19 GEN 1,2,3,Polymer80

$120.00
End Date: Saturday Jun-15-2019 14:52:00 PDT
Buy It Now for only: $120.00
Buy It Now | Add to watch list

Glock 19 Slide G19 P80 Polymer 80 Compatible Gen 3

$179.99
End Date: Wednesday Jun-19-2019 7:36:23 PDT
Buy It Now for only: $179.99
Buy It Now | Add to watch list

Extended Magwell for Polymer 80 Glock Frame

$20.00
End Date: Wednesday May-29-2019 8:36:31 PDT
Buy It Now for only: $20.00
Buy It Now | Add to watch list

Two Videos On Preparing Polymer80 PF940C Glock 19 Frames For Use

If you haven’t heard about Polymer80, they have come out with a really straight forward way to make a pistol using Glock parts. You aren’t going to really save money but you are going to have a very cool end result that you can customize however you want.

In surfing around, I came across two videos that have some pretty good camera angles and commentary about guys drilling the holes and filing down the frames that I thought I would share:


Polymer80 is offering some really innovative products. These are not hacks by any means. I like the grip angle, the texture and the finger groove built into the trigger guard. The whole concept is well executed for guys who like building their own firearms.

Note, Polymer80 products are being sold by a ton of vendors so shop around and watch for sales.

Also, be sure to download and read their instructions. They are well illustrated and have pretty good detail.

The following book is very good and I referred to it constantly during my first build along with the above-mentioned Polymer80 guidance:


If you find this post useful, please either buy something using one of the links to eBay and Amazon. With Amazon, if you click on one of our links and then buy something else – even unrelated stuff like clothes, electronics and groceries – we get credit and it would be hugely appreciated. Doing something like the above will help us fund continued development of the blog.


Please note that any images shown were extracted from the videos and remain the property of their respective owner(s).


Polymer 80 Frame PF940 FDE

$130.00
End Date: Saturday Jun-22-2019 14:09:31 PDT
Buy It Now for only: $130.00
Buy It Now | Add to watch list

Glock 17 Gen 3 Slide Upper Complete OEM For Polymer 80 G17 Gen3 Glock Factory

$419.00
End Date: Tuesday May-28-2019 15:49:56 PDT
Buy It Now for only: $419.00
Buy It Now | Add to watch list

Stainless Glock 34 Gen 3 Slide Window Cut Zev Compatible Fits P80/Polymer 80

$249.99
End Date: Wednesday Jun-12-2019 6:47:31 PDT
Buy It Now for only: $249.99
Buy It Now | Add to watch list

Glock 19 Gen 3 Lower Parts Kit OEM Factory PF940C G19 80 Polymer80

$51.99
End Date: Friday May-31-2019 8:50:45 PDT
Buy It Now for only: $51.99
Buy It Now | Add to watch list

Glock 19 Gen 3 Slide Upper Complete OEM For Polymer 80 G19 Gen3 Glock Factory

$419.00
End Date: Monday Jun-17-2019 15:19:25 PDT
Buy It Now for only: $419.00
Buy It Now | Add to watch list

Steel City Arsenal [UltraLight] slide for Glock 26 gen 3/4 or Polymer 80 PF940SC

$279.99
End Date: Thursday Jun-20-2019 15:42:03 PDT
Buy It Now for only: $279.99
Buy It Now | Add to watch list

Glock 26 Gen 3-4 Slide Upper Barrel Glock OEM G26 Gen4 Polymer80 PF940SC

$429.00
End Date: Monday Jun-17-2019 5:53:03 PDT
Buy It Now for only: $429.00
Buy It Now | Add to watch list

CUSTOM SLIDE | STAINLESS STEEL BLACK CERAKOTE - FOR GLOCK 19 GEN 1,2,3,Polymer80

$120.00
End Date: Saturday Jun-15-2019 14:52:00 PDT
Buy It Now for only: $120.00
Buy It Now | Add to watch list

Glock 19 Slide G19 P80 Polymer 80 Compatible Gen 3

$179.99
End Date: Wednesday Jun-19-2019 7:36:23 PDT
Buy It Now for only: $179.99
Buy It Now | Add to watch list

Extended Magwell for Polymer 80 Glock Frame

$20.00
End Date: Wednesday May-29-2019 8:36:31 PDT
Buy It Now for only: $20.00
Buy It Now | Add to watch list