Unicorn Airsoft 6.03mm Nitroflon Coated Brass Inner Barrel GBB For Tokyo Marui P320 GBB Airsoft (106mm) Length-(mm)_591.0 Its core hollow design is

Its core hollow design is specifically engineered to accommodate an Acetech AT2000R tracer unit (sold separately)

and distinctive appearance including a ventilated rib and full-length underlug

5KU CNC Aluminum EX Style CNC Trigger for Marui GSeries GBB (Red)

This particular version is designed to fit the XC1 Weapon Light

With 6 Position

Unicorn Airsoft 6.03mm Nitroflon Coated Brass Inner Barrel GBB For Tokyo Marui P320 GBB Airsoft (106mm) Length-(mm)_591.0 Its core hollow design isKey Feature Brass Construction ( Nitroflon Coated) High grade precision barrel at 6. 03mm diameter for extra power and precision shooting Suitable For Tokyo Marui P320 Gas Blow Back GBB Pistol Airsoft Guns For custom upgrade user, you can choose a longer barrel Length: 106mm