Spikes Tactical SLPK101 Multi-Caliber Lower Parts Kit - Black Oxide Stainless Steel for AR-Platform

Building or upgrading an AR platform rifle starts with a solid lower parts kit, and the Spikes Tactical SLPK101 Multi-Caliber Lower Parts Kit delivers the quality and durability you need for any caliber setup. This complete kit features black oxide stainless steel components that resist corrosion and maintain their finish through hard use in the field or at the range. Whether you're assembling your first AR or your tenth, having a reliable lower parts kit with above-spec components takes the guesswork out of sourcing individual parts.

What sets this kit apart is the attention to fit and finish. Spikes Tactical manufactures this lower parts kit entirely in the USA, and it exceeds military specifications across the board—meaning tighter tolerances, smoother operation, and parts that work together without the binding or rough edges you might encounter with basic mil-spec kits. The included Spike's Pro Grip is ergonomically refined for better control and comfort during extended shooting sessions, whether you're hunting, competing, or training.

This kit includes the trigger group, which is typically the most critical component to source individually. Having everything spec'd and tested as a matched set means less hassle and greater reliability. The multi-caliber compatibility means you can use this kit across different AR builds—.223/5.56, 6.5 Creedmoor, 300 Blackout, or whatever platform you're running—making it a smart investment if you're planning multiple builds or caliber conversions.

Key Features

• Complete lower parts kit with trigger group included
• Black oxide stainless steel construction for corrosion resistance
• Exceeds military specifications for superior fit and finish
• Spike's Pro Grip for improved ergonomics and control
• Multi-caliber compatible with AR-platform rifles
• 100% manufactured in the USA

Specifications

Frequently Asked Questions

Can I use this lower parts kit with different AR calibers?

Yes—the SLPK101 is designed as a multi-caliber kit and works with AR-platform rifles across different calibers, including .223/5.56, 6.5 Creedmoor, 300 Blackout, and others.

What components are included in this lower parts kit?

The kit includes the complete trigger group and Spike's Pro Grip. It provides all the primary parts you need to finish a lower receiver.

Is this kit made in the United States?

Yes—Spike's Tactical manufactures the SLPK101 entirely in the USA.

How does this kit compare to standard mil-spec lower parts kits?

The SLPK101 exceeds military specifications with superior fit and finish, tighter tolerances, and smoother operation. The black oxide stainless steel construction also provides better corrosion resistance than standard mil-spec finishes.