Product Overview
This CNC aluminium device fills the space around the hop up chamber in M4/M16 type AEGs. It reinforces the weak front part of the gearbox and dramatically reduces the chances of the shell cracking.
The ZCI M-Block is made of very light, but durable aluminium T6 with a metallic red finish.
Compatibility: most M4 AEG brands (not suitable for two-piece hopup chambers)
Note: if you install this device in a front wired AEG, you must route wiring around the chamber and the M-Block.
