XTS AR15 Lower Parts Kit - Complete Fire Control Group With Takedown Pins Bolt Catch Springs

The XTS AR15 Lower Parts Kit LOWER-PK is a complete collection of AR-15 lower receiver components, designed for builders, hobbyists, and gunsmiths who want a reliable, all-in-one solution to finish a lower. Packaged in a boxed kit with a hanging tab for easy display or organized storage, it provides every essential part in one place.

• Comprehensive lower parts set: Includes all the pins, detents, springs, and small components needed to complete a standard AR-15 lower, from takedown pins to the pistol grip.
• Mil-spec compatibility: Sized to fit most AR-15 receivers and interfaces with standard magazines and components for dependable operation.
• Spring-loaded hardware: Detents and springs for takedown pins, bolt catch, selector, disconnect, and other critical parts for smooth cycling and reliable retention.
• Firing-control components: Hammer, trigger, and associated springs and pins to support a consistent, predictable trigger pull and safe hammer function.
• Magazine and safety hardware: Magazine catch with spring and button, safety selector, selector detent and spring, plus a lock washer for secure installation.
• Trigger guard and grip hardware: Trigger guard assembly with pivot spring pin, plus a pistol grip screw and pistol grip for ergonomic handling.
• Packaging and display-ready: Boxed kit with hanging tab, making in-store organization and retail display straightforward.

With the XTS LOWER-PK, you gain a ready-to-build lower that reduces sourcing time, helps ensure proper function across critical components, and supports a clean, efficient assembly process. It’s ideal for first-time AR-15 builders completing a project, as well as seasoned gunsmiths replacing worn parts. The included pistol grip and screw allow quick ergonomic customization, while the mil-spec parts help you compare and upgrade with confidence. Whether you’re stocking your workshop or building a new rifle, this kit provides the essential, reliable foundation for a solid lower receiver build.