Colt Clt High Wear Parts Kit M4

The Colt High Wear Parts Kit M4 is an OEM-spec replacement and maintenance set engineered to restore reliability to mil-spec AR-15 and M4 rifles. Built to Colt's military specifications, this kit packages the internal components most vulnerable to wear and fatigue—the parts that take the hardest beating during heavy use, training cycles, or deployed service. Whether you're running preventive maintenance on a rifle you shoot regularly, supporting an armorer's bench, or keeping field-ready spares on hand, this kit delivers genuine Colt quality and fitment assurance across any mil-spec AR-15/M4 lower.

High-round-count rifles develop wear in predictable places. Extractors lose tension, springs lose their snap, and small pins can go missing in the field. Rather than troubleshoot individual failures, many experienced shooters and armorers refresh these components all at once—it's faster, smarter, and guarantees consistent trigger control and reliable feeding and ejection. The Colt kit consolidates the parts you'll most likely need into one organized set, eliminating guesswork and inventory scatter.

This is genuine Colt manufacturing, not a generic aftermarket substitute. Every part meets the same tolerances and material standards as the components found in Colt's duty-grade rifles. That means proper fit in your lower, no surprise incompatibilities, and the confidence that comes with known-good parts from a maker with a century of rifle pedigree.

What's Included

• Extractor with spring assembly and pin
• Hammer and trigger springs
• Disconnect spring
• Ejector and ejector spring with pin
• Safety detent spring
• Bolt ring
• Hammer and trigger pins
• Firing pin and retaining pin

Specifications

Frequently Asked Questions

Will this kit work with my mil-spec AR-15 lower?

Yes. The Colt High Wear Parts Kit is engineered for mil-spec AR-15 and M4 lowers and includes all the common replacement parts that fit standard mil-spec uppers and lower components.

What makes this better than a generic parts kit?

These are manufactured to Colt's original military specifications. You get the same parts Colt uses in its own rifles, which means exact fitment, consistent performance, and the confidence of OEM quality—not a generic approximation.

When should I refresh these parts?

High-wear components are good candidates for replacement during routine maintenance on rifles that see heavy use, after extended training cycles, or as a preventive refresh on older rifles. Many armorers and serious shooters replace these parts on a schedule or at the first sign of functional wear (sluggish trigger reset, feed issues, or ejection problems).

Do I need gunsmithing tools to install these?

This kit includes the internal components—springs, pins, and small parts that live inside your lower. Installation will require basic armorer tools (pin punches, screwdrivers) and familiarity with lower receiver disassembly. If you're new to it, a gunsmith or experienced armorer can install the kit quickly and affordably.