This Kit is for the installation of an MK Mechbox into the JM ACR/Gen 10

This Kit is for the MK Mechbox ONLY.


Kit Includes:

Custom T-Piece (Brass)

Custom Nozzle (Aluminium)

Gold Series Barrel (up to 500mm)

Free Delivery


This kit allows you to install an MK Mechbox into an ACR. The components supplied are all made to our BM1 spec and meet the tolerances required to successfully operate the blaster once complete.

The Kit is compatible with all aftermarket metal outer barrel systems currently available. 

The custom made T-Piece is capable of a higher flow rate with zero chance of clogging.

The lightweight nozzle has been machined to match the T-Piece which provides support and prevents latteral movement. This reduces friction and wear on associated components.

Will accept all inner barrels of 9.5mm outer diameter. Two o-rings are used to seal the barrel in the T-Piece thus making it easier to remove the barrel for cleaning amd maintenance.

This Kit is NOT COMPATIBLE with the Std V2 Mechbox. Please see other listing if you have this.


There is a certain level of skill required to perform modifications of this nature and whilst we can gaurantee that when properly used these products will outperform all others we cannot gaurantee workmanship other than our own. If you are unsure of your capabillities or do not have the necessary tools required to carry out such modifications we advise that you seek assistance.


These products have been tested and have proven reliable in extremely high performance builds of both muzzle velocity and cyclic rate. We accept no liabillity for damage should any failure occur. We will however provide assistance and advice for matters relating to our products if required.


As with all Bruisemaster products you are covered by our replacement warranty and entitled to free support. Please keep in mind when purchasing that our products are made to order and allow up to ten business days for your items to be made and sent. We send via express post and all items are tracked. Thank you


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