CNC Hop-Up Chamber for M249 – Precision and Optimized Performance

Achieve maximum consistency and reliability with this CNC-machined hop-up chamber, designed for precise adjustment and optimal air seal. Engineered for durability and high performance, it ensures stable shots and excellent hop-up tuning.

Key Features

• Material: High-quality anodized metal construction
• Weight: Only 29 g, lightweight yet extremely durable
• Numbered Adjustment: 10-level hop-up setting with laser-marked numbers and a click-lock ball system for precise tuning
• U-Shaped Adapter: Allows the use of both standard and shaped hop-up nubs for improved pressure distribution
• Metal Adjustment Ring: Features limit stops for secure and precise adjustments
• CNC Manufacturing: Ensures minimal tolerances for maximum precision with no rough edges

Compatibility

Compatible with M249 machine guns from:

• A&K, PJ, Classic Army, Echo1, Matrix (tested with original factory nozzles)

Package Contents

• CNC Hop-Up Chamber with adjustment ring
• Brass barrel centering ring
• U-shaped Hop-Up nub adapter
• Spring and ball for locked adjustment
• Rubber ring for firmer hop-up setting

Installation Instructions

• For best performance, test different Hop-Up buckings and nozzles to achieve the best air seal.
• Apply silicone oil to the bucking or inside the chamber for easier assembly.
• Avoid getting silicone oil inside the barrel, as it will affect hop-up efficiency.
• 1.5mm Allen key not included (needed to secure the barrel in the chamber).
• Lightly lubricate the surfaces between the chamber and the adjustment ring for smoother tuning.

User Benefits

This hop-up chamber improves shot consistency, accuracy, and overall reliability—essential features for high-level airsoft performance. The numbered adjustment system allows for easy fine-tuning, while the high-quality materials provide long-lasting durability.

Warnings

• Keep out of reach of children.
• Do not tamper with the product. Unauthorized modifications may affect its performance.
• Check compatibility with your replica before purchasing.
• Installation should be performed by experienced personnel. Improper assembly may damage the hop-up system.