RETRO ARMS - CNC Machined Aluminum Rotary Hop-Up Unit M4 M16 Airsoft AEG

Features:

• CNC machined construction
• Rotary design allows for easy adjustment
• Constructed from EN AW 7075 for extended lifespan
• All necessary hardware included
• Bucking not included

Manufacturer: Retro Arms

Compatibility: Most M4 series Airsoft AEGs

Material: Aluminum Alloy