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  • Polymer 80 PF45 Large Frame Lower

Polymer 80 PF45 Large Frame Lower

SKU: 2849
--- Pending U.S Legislation seeks to effectively outlaw the building of 80% Lowers. For more information, click HERE to read the proposed bill. ---

This is the latest design from Polymer80, finally giving you the opportunity to build your own .45ACP or 10mm Glock compatible frame!

Build your own handgun… with an 80% Lower that you build with Glock parts. Compatible with parts designed for Gen3 Glock 20SF and 21SF platforms.

No serial number, no FFL required, and no registration needed!* 

Click Hereto check out our blog to learn about the legality of building your own firearm!

Make sure to check out our Lower Parts KitUpper Parts Kit, and Complete Uppers to help complete your build.

Please Note: The Polymer80 Frame is compatible with Gen3 Parts only.

*Laws vary by state. Click Here for the latest information on California law regarding 80% lowers. Be sure to check with your state's Department of Justice for changes in laws pertaining to 80% builds.

Return Policy
Due to the unique nature of this item, the Polymer80 lower is non-refundable once it has been modified in any way.
Federal law states that you can build a firearm for personal use. This law has been in effect for years but no one knows when or if it will be changed or repealed.

Now is your best time to purchase the Polymer80 lower. This do-it-yourself kit accepts Glock factory parts and we at the GlockStore have assembled both a Lower Parts Kit and an Upper Parts Kit to help you build the Polymer80 into a fully functional firearm. Of course, you probably already knew that!

The Polymer80 is one of the best lower kits available. It is very high quality and we've seen many complete guns that have turned out great. We've also seen some that were not finished correctly so it is extremely important that you read and follow the directions.

There are a lot of reasons to purchase an 80% lower. We're here to support your choice with the information and parts you need to make it a reality.

Return Policy
Due to the unique nature of this item, the Polymer80 lower is non-refundable once it has been modified in any way.

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Ratings & Reviews

2 reviews

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worth the wait built and tested same day


Really happy
finally got the pf 45 large frame after a long wait had it together same day since other parts and upper from G.S. were here waiting. I did it in 10mm auto. The plastic is thicker than the other p80's had it together in 30 mins .sat on couch another hour getting it smoothed out. runs good

Some work needed


I love these 80% builds but... this one gave me a bit of heartache. The wholes were not perfectly aligned (on both frames that i bought. So no it was not a coincidence, on both frames once assembled the slide would not go in all the way unless u engage the trigger [i found out after a lot of struggle and a broken trigger block] other than that it works pretty well and im happy with it. Now i only need a g21 slide for the remaining frame since the 1st one was transformed into a 10mm g20 😀