CMMG 55AFF68 Bolt Rehab Kit 223/5.56 NATO AR-15 Replacement Parts

The CMMG 55AFF68 Bolt Rehab Kit provides AR-15 owners with essential replacement components to restore bolt function and extend service life. This comprehensive kit addresses common wear points that develop after thousands of rounds through the gas system.

What Makes This Different

Unlike generic replacement parts, CMMG manufactures these components to mil-spec tolerances with premium materials. The kit includes critical wear items that typically require replacement together, eliminating the guesswork of identifying failed components. Each part undergoes quality control testing to ensure proper headspace and timing when installed as a complete assembly.

Key Features

• Complete bolt carrier group refresh components for 223 Remington and 5.56x45mm NATO
• Mil-spec 8620 steel construction with proper heat treatment and hardness ratings
• Includes gas rings, extractor, ejector, and firing pin retaining pin
• Compatible with standard AR-15 upper receivers and bolt carrier groups
• Precision-machined components ensure proper headspace and timing
• OEM-quality parts suitable for duty and competition applications
• Reduces downtime by providing all commonly replaced items in one kit

This rehab kit addresses the most frequent failure points in AR-15 bolt assemblies. Gas rings maintain proper seal pressure for reliable cycling, while the extractor and ejector handle case extraction and ejection duties. The firing pin retaining pin secures the firing pin during operation. These components work together to ensure consistent ignition, extraction, and ejection across various ammunition types and environmental conditions.

Technical Specs

• Caliber: 223 Remington/5.56x45mm NATO
• Platform: AR-15 bolt carrier group
• Material: 8620 steel with proper heat treatment
• Finish: Phosphate coating for corrosion resistance
• Tolerance: Mil-spec dimensions and tolerances
• Manufacturer: CMMG Inc., Missouri, USA
• Part Number: 55AFF68
• UPC: 815835012001

This bolt rehab kit represents a cost-effective solution for maintaining AR-15 reliability without replacing the entire bolt carrier group. CMMG's reputation for quality control and precision manufacturing ensures these components will restore proper function to worn assemblies.