POLYMER80 PF940CL 80 Compact Long Slide Frame And Jig Kit Glock 34 19L Compatible

About this product

The Polymer80 PF940CL is an 80% pistol frame and jig kit built to accept Glock Gen 3 pattern components, specifically sized for long-slide models like the G34 and G19L rather than the standard-length G17/G19 frames. It ships as an unfinished polymer frame plus the jig and hardware needed to mill it to a finished, functional state, not as a complete, ready-to-shoot pistol. This is the compact long-slide variant in Polymer80's PF940 family, aimed at builders who specifically want that longer-slide fit.

What is the PF940CL kit?

It's an unfinished polymer handgun frame — legally not yet a firearm until milled — sold with a jig system and the bits needed to complete the fire control pocket, trigger pin holes, and other machining required to accept Glock Gen 3, 3-pin pattern internals. Polymer80 built the reinforced polymer frame with an extended beavertail, a double-undercut trigger guard, and an 18-degree grip angle rather than Glock's stock 22-degree angle, changes aimed at better recoil control and faster follow-up shots. The 'CL' designation means it's shaped for long-slide compatibility rather than the standard-length PF940v2 frame.

What is it used for?

Builders use this kit to assemble a custom Glock-pattern pistol using either OEM or aftermarket Glock-compatible internals and a long-slide upper assembly, typically for competition, range use, or as a personal project for shooters who want to build rather than buy a complete pistol. It requires machining tools and Glock-compatible parts beyond what's in the box — this kit alone does not make a functioning firearm. Shooters drawn to the long-slide format specifically want the extended sight radius that a G34 or G19L-length slide gives over a standard-length Glock build.

What fits it?

Per the manufacturer, this frame is compatible with Gen 3, 3-pin Glock components for the G17, 17L, 22, 24, 31, 34, and 35 pattern, and accepts OEM and aftermarket Glock magazines once completed with the correct long-slide upper. Completing the build also requires a compatible slide, barrel, and internal parts kit, none of which come with this listing — budget for those separately. Aftermarket Glock-pattern trigger and sight upgrades that fit a standard Gen 3 frame will generally fit this one too, once assembled.

Who is this not for?

This is not a beginner's first-gun purchase — it requires machining the frame yourself with basic tools before it functions as anything, and it is not a complete, ready-to-shoot pistol out of the box. Anyone who wants a finished handgun without a build project should buy a complete Glock-pattern pistol instead. Buyers without a drill press, jig clamps, or basic gunsmithing patience typically end up frustrated partway through and are better served buying a finished pistol.

Does it work in California?

This is the one to slow down on. California classifies unfinished frames and receivers as 'firearm precursor parts,' and state law requires precursor part sales to go through a licensed vendor with a background check on the buyer — you cannot simply order this to your home the way you might from an out-of-state retailer. Contact us directly before ordering so we can walk you through what current California law requires for this exact type of purchase; general background on the state's rules is on our California gun laws page.