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Polymer80 PF45: Large Frame for Glock 20 and 21 Parts (10mm and .45 ACP)

The PF45 is Polymer80’s large frame and the only 80% frame built for Glock 20 and 21 slides. It uses the G21SF-size grip, so it is slimmer in the hand than a standard Glock 21, with the usual Polymer80 beavertail and texture.

Compatibility. Glock 20 (10mm) or Glock 21 (.45 ACP) Gen 3 slide, barrel and large-frame lower parts kit. Glock 40 and 41 long slides also fit. Standard-frame Glock 9mm and .40 parts do not.

Finishing the frame. The kit ships with the PF45 jig, bits and end mill. The rail system is the large-frame stainless set, which is not shared with the PF940 frames.

Magazines and holsters. Glock 21 13-round .45 ACP magazines or Glock 20 15-round 10mm magazines depending on the slide you fit. Holsters molded on a Glock 20 or 21 slide fit.

Buying from Delaware Firearms. Frames, lowers and complete pistols transfer through your licensed FFL dealer with a background check. Jigs, tools, slides and parts ship directly to you. Delaware has no sales tax. Find PF45 kits in Polymer80 Frames.

Frequently asked questions

Can I build a 10mm on the PF45?

Yes. Use a Glock 20 Gen 3 slide and barrel and Glock 20 magazines. The frame does not care about calibre; the slide assembly sets it.

Which magazines fit the PF45?

Glock 20 and 21 pattern magazines, including 10mm and .45 ACP factory mags and aftermarket versions.

Shop Polymer80 PF45: Large Frame for Glock 20 and 21 Parts (10mm and .45 ACP)