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The legendary KWA 3GX mechbox is heavily reinforced and radiused to provide years of reliable use. The introduction of the 3GX mechbox brought AEGs to a whole new level of performance by introducing KWA’s Kinetic Feedback System, or KFS, which provides a realistic felt recoil. These mechbox shells work with the AEG3 RM4 and AEG2.5 VM4 (cut off) system.

You can select either the right, left, or both sides of the mechbox (by adding one at a time) in the dropdown menu. Please note that these mechbox pieces do not come with the 9mm bearings, which can be purchased separately in our ProShop.

Mechbox Shell Side

Left Side Only, Right Side Only

Model

RM4 ERG Series

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