Fancy a custom barrel for you Marui compatible M4? APS/EMG have a series of F1 licensed barrels to chose from.
F1 Firearms Outer Barrel for Airsoft (Toys gun parts)
CNC Cutting
(APS)
F1001B – Straight style Outer Barrel, Coloraturas in Black
F1010B – Twist Style Outer Barrel, Coloraturas in Black
F1011B – Dot Style Outer Barrel, Coloraturas in Black
F1012B – Cross Style Outer Barrel, Coloraturas in Black
F1013B – Laser Style Outer Barrel, Coloraturas in Black
F1014B – Line Style Outer Barrel, Coloraturas in Black