80% Frame Compatibility Guide

The GLOCK® and 1911 handguns are perhaps two of the most popular firearms in America. It's no surprise 80% frames have been made for custom builds. This guide compares frame blank compatibility with handgun models, calibers, and parts.

All P80 Frames Are "Gen 3"

The Polymer80 line of frames are compatible with Gen 3 GLOCK® parts. Some Gen 4 and newer GLOCK® parts are not compatible with 80% frames. 

These Gen 4+ parts are incompatible with Gen 3/P80:

• Slide
• Frame
• Recoil spring
• Trigger housing
• Magazine release button

These Gen 4+ parts are compatible with Gen 3/P80:

• Trigger bar
• Connector
• Ejector
• Magazine

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Types of 80% Pistol Frames

There are five GLOCK® 80% frames available: The PF940C, PF9SS, PF940V2, PF45, and the PF940SC. These are developed by Polymer80.

There are two variants of the aluminum 1911 80% frame: .45 ACP (Full-Size / 5"), and 9mm (Full-Size / 5"). These are developed by Stealth Arms.

Polymer80 PF940C Frame

The PF940C is the most popular Polymer80 frame available today. It's used to build a handgun like the GLOCK® 19 (9mm), G23 (.40 S&W) and G32 (.357 SIG).

Frame & Parts Compatibility

• Available in Black, FDE, and Gray.
• Compatible with CAA Micro "Roni" Conversion Kit.
• The PF940C is compatible with all these G19 parts.
• Pair any of these G19 Pistol Build Kits with this frame.

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Polymer80 PF9SS Frame

The PF9SS 80% frame is a compact 9mm frame, designed to work with the Glock® 43 (9mm) platform only.

Frame & Parts Compatibility

• Available in Black, FDE, and Gray.
• The PF9SS is compatible with all these G43 parts.
• Pair any of these G43 Pistol Build Kits with this frame.

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Polymer80 PF940V2 Frame

The PF940V2 frame is Polymer80's most widely compatible option. It is designed to work with the GLOCK® 17 and G17L (9mm), G22 and G24 (.40 S&W), G31 (.357 SIG), G34 (9mm) and G35 (.40 S&W) handguns.

Frame & Parts Compatibility

• Available in Black, FDE, and Gray.
• Compatible with CAA Micro "Roni" Conversion Kit.
• The PF940V2 is compatible with these G17 parts.
• Pair any of these G17 Pistol Build Kits with this frame.

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Polymer80 PF45 Frame

The PF45 is one of Polymer80's largest caliber frames. It's designed to work with the GLOCK® 20 (10mm Auto) and G21SF, also called the "G21 Short Frame" (.45 ACP).

Frame & Parts Compatibility

• Available in Black, FDE, and Gray.
• The PF45 is not compatible with standard G21 parts.
• The PF45 is compatible with G20 and G21SF parts (sold elsewhere).

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Polymer80 PF940SC Frame

The PF940SC is designed to work with the GLOCK® 26 (9mm) and G27 (.40 S&W) platforms.

Frame & Parts Compatibility

• Available in Black, FDE, and Gray.
• The PF940SC is compatible with these G26 parts.
• Pair any of these G26 Pistol Build Kits with this frame.

Grab a P80 Build Kit For Your Frame

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80% 1911 Frame

Stealth Arms' 1911 80% frame are made from aluminum instead of steel, providing easier fabrication before assembly.

Frame Options

The full-size (5") 80% 1911 frame is designed to replicate the original M1911 Government frame. Stealth Arms frames are available with a raw finish or black hardcoat anodizing. Each frame is available with or without an under-barrel Picatinny rail.

Features & Specs:

• Forged and machined from 7075-T6 aluminum.
• Compatible with these 1911 Pistol Build Kits.
• Available chambered in 9mm or .45 ACP.
• Accepts standard steel 1911 magazines.

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P320 80% Frame

Sig Sauer introduced the P320 modular handgun to replace its P250 DAO handgun. The P320 departs from Sig's usual designs and uses a universal "fire control unit", or FCU. The modular FCU is considered the firearm-by-legal-definition. All other P320 parts are unregulated. 

This allows owners to easily swap the barrel, slide, magazine, caliber, and even size of the pistol. The 80% version of this new fire control unit is compatible with all factory and aftermarket P320 parts.

The P320 FCU can be swapped out for four sizes/profiles:

• Full Size (4.7" barrel)
• Carry (3.9" barrel)
• Compact (3.9" barrel)
• Subcompact (3.6" barrel)

Although they share the same barrel, the Compact P320 is shorter (5.2") than the Carry version (5.5").

The P320 accepts four calibers:

• 9mm
• .357 SIG
• .40 S&W
• .45 ACP

Read the P320 Grip & Size Guide to learn more.