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21. All the steps performed ‘inside the gearbox’ are nished. Now you can assemble the
gearbox. Do not use too much grease. In a critical situation, excessive grease may cover a
sensor.
22. In some replicas (G36, UMP, etc.) you need to modify the mechanical trigger lock, because
it is too long and touches the TITAN top board. In this case, grind the protruding element
by around 1.5/2mm [0.06/0.08 in].