ZCI M-BLock M4 Gearbox Reinforcing Clamp


In stock

icon Description

CNC aluminium device which fills the space around the HopUp chamber. Holds weak front part of the gearbox and prevents against breaking. Even more! Keeps wracked gearbox in the position and allow to continue with playing. Improved design allows to use on the most common M4 AEG brands, such as AimTop,Matrix, Classic Army, Dboys, A&K, SRC, P&J, A.P.S, G&P. Not suitable for two-piece hopup chambers.

The ZCI M-Block is made of very light, but durable aluminium T6 with nice metallic red finish. If you install this device in front wiring AEG, you must route wiring around the chamber and around this MBlock. Our previous model or other brands have square corners which may cause wire damage and shortcut. As you can see, we had changed the route of the wirings and critical corners were rounded. In the video below, you can see how to install MBlock in M4 with the front wiring. Installation is now much easier and faster.


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Starting out as the top producer of airsoft AEG upgrade components, ZCI has rapidly evolved to become a reliable source for magazines, 40mm gas moscarts, GBB pistol parts and replacement items, rail systems and many more. We stock a range of these components, sourced from ZCI, to ensure the best quality. ZCI products are renowned for their durability and accuracy, making them ideal for the most demanding airsoft players. Read More
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At Socom Tactical we aim to ship all orders same working Day During our working hours. All orders before 14:00 we aim to ship the same day. Shipments are shipped Monday, Wednesday, Thursday, Friday sadly due to no collections we are unable to ship Saturdays.

Pricing and Times

UK Mainland   £6 or Free on orders over £100

Europe   £10 - Delivery 3-7 working days (Excluding any customs delays)

Rest of the World   4- 14 Working Days (Excluding any customs delays)

Additional Time There May / Will be additional delays for Remote UK, Highlands and Islands, as well as Northern Ireland typically this, adds an additional 1-2 working day

UK Shipping Methods -   Typically most orders over £30 or 1kg are sent via DPD local Next Working Day delivery. You will receive an email and/or Text message from DPD with a 2-hour delivery window. Packages under 1kg or £30 will be shipped by Royal Mail First Class Tracking number can be viewed on your account

EAN: 5060722712631 Category: