Complete Lower Parts Kit Fits Combat Armory Frame Fits G19 G23 GEN3 Style Lpk

About this product

This is Combat Armory's complete lower parts kit (LPK) built to finish out a Combat Armory frame or a Gen 3 Glock 19/23-pattern pistol build. Rather than sourcing dozens of individual small parts separately, this kit bundles everything needed to complete the fire control system and lower assembly in one package.

What's included in a Gen 3-style Glock LPK?

A complete Gen 3-pattern lower parts kit typically covers the full fire control group and lower assembly hardware: trigger housing with ejector, trigger bar, trigger spring, connector, slide lock and spring, slide stop lever, locking block, magazine catch and spring, magazine release spring, slide lock spring, and the associated pins. Combat Armory's version is built specifically to complete a Combat Armory Gen 3-pattern frame or a compatible G19/G23-style build, and includes the two different slide lock springs needed to correctly support both G17-length and G19-length slides.

Is this kit compatible with my build?

This LPK is designed around the Gen 3 Glock 19/23 pattern, so it's built to work with Combat Armory's own Gen 3-pattern polymer frames as well as other frames machined to the same Gen 3 dimensions and tolerances. Because aftermarket frame tolerances can vary slightly between manufacturers, some fitting or minor adjustment is common with any aftermarket LPK — this is normal for the parts-kit build process and not unique to this kit.

Does this kit include a trigger?

Combat Armory sells versions of this kit both with and without a pre-assembled trigger group; check the specific listing configuration for whether a trigger and trigger bar assembly are included or need to be purchased separately, since Combat Armory also sells standalone billet trigger upgrades that pair with this kit.

Do I need an FFL to buy this parts kit?

No. A lower parts kit on its own is not a firearm and does not require an FFL transfer — it ships directly to you. An FFL background check and transfer is only required once you assemble a complete, functional handgun frame with these parts installed, at which point the completed firearm is subject to the same purchase, transfer, and (in California) roster rules as any other handgun.

What should California builders know before ordering?

California has specific rules around home-built firearms, including registration requirements for self-manufactured handguns and frames. Builders in California should confirm current state requirements for completed, self-built pistols before finishing any build using this kit, since parts-kit purchases themselves are unregulated but the completed firearm is not.

What tools and skills does installing this kit require?

Installing a complete lower parts kit generally requires a basic punch set, a small hammer, and some familiarity with Glock-pattern disassembly — most of the pins and springs in a Gen 3 LPK seat with light punch pressure rather than specialized tooling. Builders who haven't assembled a striker-fired pistol frame before should budget extra time and expect to reference a written or video build guide, since correct spring and pin orientation matters for reliable function, and getting a detail backwards (like the slide lock spring for the wrong slide length) is a common first-build mistake this kit's inclusion of both springs helps avoid.

For anyone finishing a Gen 3 Glock-pattern build, this kit is a straightforward way to get the small parts needed in one order rather than sourcing them piecemeal, and it ships fast since it's not a regulated item.