Phalax M4 already have a MTW so no use for a second m4.
This M4 is based on an E&C Mk16 with a quick-change spring system.
Inside you will find a SHS aluminum piston head, SHS aluminum cylinder head, stock cylinder, stock piston (all metal teeth), 18:1 gear ratio with 3 teeth, M120 spring, Gate Titan Expert, Maple Leaf Super Macaron 60 and Maple Leaf Omega tensioner.
The replica is brand new except I emptied 1 magazine to see if it works!