Spike's Tactical LPK 5.56 Lower Parts Kit (No Trigger Group)

Building or completing an AR-15 platform rifle? A quality lower parts kit is essential foundation work, and the Spike's Tactical LPK 5.56 lower parts kit is built to go the distance without compromise. This no-trigger-group kit includes everything else you need to finish a lower receiver—giving you the flexibility to source and install your own trigger mechanism to match your shooting style, whether that's a match-grade unit for precision work or a combat-proven mil-spec pull for duty or hunting.

What sets Spike's Tactical apart is execution: these components exceed military specifications and deliver fit and finish that simply outpaces budget-bin alternatives. The Spike's Pro Grip is engineered for real control and comfort during long range sessions, follow-up shots, and tactical transitions. The entire kit is manufactured in the USA, and that matters—you're supporting domestic production while getting parts that won't rattle or wear prematurely on the range or in the field.

Whether you're assembling your first AR or adding another upper to your collection, this kit removes guesswork from the parts-sourcing game. It's spec-correct, it's overbuilt compared to mil-spec baseline, and it's ready to function in whatever chambering and configuration you're running in 5.56 NATO. Install it with your preferred trigger group and get to work.

Key Features

• Spike's Pro Grip for enhanced control and ergonomics
• Exceeds military specifications for durability and reliability
• USA-made components and manufacturing
• Superior fit and finish compared to standard mil-spec kits
• Trigger group sold separately, allowing customization to your needs

Frequently Asked Questions

What comes in this lower parts kit?

This Spike's Tactical LPK includes all the internal components needed to complete a lower receiver for a 5.56 NATO AR-15, with the exception of the trigger group. You'll need to source and install a trigger assembly (fire control group) separately.

Can I use this kit with any AR-15 lower receiver?

Yes—this kit is designed for standard mil-spec AR-15 lower receivers chambered in 5.56 NATO and compatible platforms.

Why would I want a lower parts kit without a trigger group?

Separating the trigger group allows you to choose the specific trigger that matches your application. Hunters, precision shooters, and tactical users often prefer to select their own trigger rather than accept whatever comes in a complete kit.

Is this kit manufactured in the United States?

Yes. Spike's Tactical manufactures this LPK in the USA.