NexxSpeed CNC Aluminum Rotary Hop-Up Unit – M4 / AR15 AEG (Black Edition)

Overview: The NexxSpeed CNC Aluminum Rotary Hop-Up Unit is a precision-machined aftermarket upgrade designed for TM-spec M4 / AR15 Airsoft Electric Guns. Built around a rotary adjustment system, this hop-up chamber focuses on improving shot-to-shot consistency, tuning repeatability, and overall accuracy. Its one-piece CNC aluminum body promotes stable alignment between the inner barrel and gearbox nozzle. This unit is intended for experienced AEG users looking for finer hop control and improved air seal consistency.

Rotary Adjustment System: The numbered rotary dial allows precise and repeatable hop-up tuning. Compared to traditional slider-style systems, rotary adjustment reduces the chance of setting drift during gameplay, helping maintain consistent backspin over extended use.

One-Piece CNC Aluminum Body: Machined from aluminum, the single-piece hop-up chamber improves structural rigidity and alignment stability. This helps maintain consistent nozzle-to-bucking contact, supporting more reliable air seal performance and improved consistency shot to shot.

Steel Sheet Hop Arm Design: The hop arm uses layered steel sheets of varying thickness to create controlled elasticity when pressing on the nub. This design helps distribute pressure more evenly across the bucking, promoting more uniform BB contact and improved accuracy consistency.

Interchangeable Gearbox Input Adapters: The included gearbox input adapters (OD 12mm, 11.5mm, and 11mm) allow fine-tuning of the interface between the hop-up unit and gearbox or HPA engine nozzle. This helps center the hop-up precisely, supporting improved feeding alignment and air seal stability.

Upgrade-Friendly Nub System: The package includes multiple aluminum nubs, allowing users to tune hop characteristics to match BB weight, barrel setup, and play style. This flexibility makes the unit suitable for a wide range of accuracy-focused AEG builds.

Why Choose This Hop-Up Unit?

• Rotary adjustment for precise, repeatable hop tuning
• One-piece CNC aluminum body for improved alignment stability
• Steel sheet hop arm design for consistent nub pressure
• Interchangeable gearbox input adapters for improved fitment control
• Upgrade-friendly design with multiple included aluminum nubs
• Designed for TM-spec M4 / AR15 AEG platforms

Specifications

Platform Compatibility: TM-spec M4 / AR15 AEGs
Hop-Up Style: Rotary
Unit Type: One-piece
Main Body Material: CNC Aluminum
Finish / Color: Matte Black
Installation Notes: Drop-in fitment; compatibility may vary by brand and tolerances
Package Includes: CNC aluminum hop-up chamber, aluminum nubs (multiple), steel hop arm shim sheets, gearbox input adapters (OD 12mm / 11.5mm / 11mm), springs and spacers as shown