Manufacturer: Airtech Studios
Type: Inner Barrel Locking Ring
Compatibility: M4 and Scar Maxx Hop-up chambers
Materials: Ultra-tough polycarbonate

Pros:

• Fully lock on the inner barrel and hop-up chamber.
• Elongated O-ring to latch onto the inner barrel.
• Stabilized System Prevents any vibrational shift on the hop set-up.
• Improve shooting consistency.
• Tough Polycarbonate Construction. 6x silicone O-rings are also included with the package used to replace the spring that goes along the inner barrel. Tests incrementally you need for a perfect fit.

Cons:

• Compatible designs:
• MAXX CNC Aluminum Hop-up Chamber ME - PRO & SPORT
• MAXX CNC Aluminum Hop-up Chamber MI - PRO & SPORT
• MAXX CNC Aluminum Hop-up Chamber SV - VFC SCAR-L/H
• MAXX CNC Aluminum Hop-up Chamber ME - Umbrella Armory Ver.
• MAXX CNC Aluminum Hop-up Chamber ME - EMG & Specna Arms Ver
• NO hop-up chamber included.

Comments:  The Advanced locking ring is designed to replace the current Maxx O-ring (Normally brass) ring at the end of setting up the hop unit.  This new advanced model comes longer in size to lock more of the inner barrel and hop-ups surface area to further stabilize the sensitive system, limiting vibrations and inducing more consistent shots.