ZCI M4 / M16 CNC Rotary Hop Unit – Metal

Upgrade your M4 or M16 airsoft AEG with a precision, CNC-machined rotary hop unit. This metal upgrade is designed for shooters who demand accurate, repeatable hop control and durable construction.

• Compatibility: Fits M4 and M16 platform AEGs with standard rotary hop-up configurations, ideal for common receiver layouts.
• Material & Manufacturing: Solid metal construction that is fully CNC machined for tight tolerances and dependable performance.
• Rotary Hop Adjustment: Micro-adjustable rotary mechanism allows precise tuning of hop-up to achieve desired backspin across BB weights.
• Precision & Alignment: Engineered to align consistently with the inner barrel and bucking, reducing wobble and improving consistency shot to shot.
• Design Approach: Inspired by proven hop-unit concepts, but produced with full CNC processes to enhance accuracy and repeatability.
• Installation & Fit: Designed as a straightforward upgrade to compatible M4/M16 receivers, minimizing setup time and shim requirements.

With the ZCI CNC Rotary Hop Unit, you’ll experience tighter groupings and more predictable performance across varying conditions and BB weights. The precise, repeatable adjustments let you dial in the exact hop profile needed for longer-range shots or close-quarters engagements, while the rugged metal construction stands up to field use without sacrificing consistency. This upgrade is ideal for players upgrading stock hop units, competitors seeking repeatable results, and anyone looking for a durable, high-precision hop-up solution.