Clt Lower Receiver Parts Kit Semi

The Colt Lower Receiver Parts Kit Semi is the complete internal control group you need to finish an AR-15 lower receiver or refresh the worn components in an existing rifle. Built to Colt's mil-spec standards, this kit delivers the same reliability Colt chambers into its factory rifles—giving you a trusted foundation whether you're assembling your first AR, upgrading controls, or maintaining a rifle collection with genuine OEM parts.

A lower receiver parts kit handles the mechanics: trigger, safety, magazine release, bolt catch, takedown and pivot pins, springs, detents, and grip hardware. For AR-15 builders, this is the workhorse kit that replaces the need to source a dozen small parts individually. Each component is engineered to fit and function cleanly in a mil-spec lower, so you don't have to guess about compatibility or waste time troubleshooting rough edges.

Colt's track record in military and law enforcement builds confidence in their design choices. Whether you're building a duty rifle, a competition gun, or simply want to know every part meets a real standard, starting with a factory OEM kit takes the guesswork out of the receiver. Steel and polymer components work together to keep costs reasonable while maintaining the durability you expect from a Colt-assembled platform.

Key Features

• Complete mil-spec control group for AR-15 lower receiver assembly
• Colt-manufactured components to exact military specifications
• Includes trigger assembly, safety selector, magazine release, bolt catch, takedown and pivot pins, springs, detents, and grip hardware
• Drop-in ready for standard mil-spec lower receivers
• Proven reliability suitable for duty, hunting, or sport shooting

Specifications

Frequently Asked Questions

What's included in the Colt lower receiver parts kit?

The kit contains a complete trigger assembly, safety selector and spring, magazine release button and catch, bolt catch and plunger assembly, takedown pin, pivot pin, springs and detents, buffer retainer and buffer retainer spring, pistol grip, pistol grip screw, and trigger guard.

Will this kit fit my AR-15 lower receiver?

Yes, if your lower is mil-spec. This Colt kit is engineered to standard mil-spec dimensions and will drop into any mil-spec lower receiver.

Can I use this kit to replace worn parts in an existing rifle?

Absolutely. The kit works for complete assembly or as a parts source to refresh controls and internals on a rifle that's seen use.

Is this for semi-automatic only?

Yes, this is a semi-automatic lower receiver parts kit designed for civilian AR-15 builds and rifles.