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Replace the trigger PCB for the official Semi/Full or Semi-only configuration.

Disassemble and rebuild the official MDRX 78-round magazine without damaging the base tab.

Install the battery and set the control-board jumper for the battery condition shown by Silverback.

A visual introduction to the MDR-X platform. This is not a maintenance or operating procedure: the official video contains no spoken fitting, firing, or adjustment instructions.

Field-strip and rebuild the Silverback VKS: spring-guide safety, 5 mm barrel removal, 6 mm lock pin, 4 Nm clamps and correct pin order.

Configure the Silverback VKS ejection-port cover to stay closed: notch orientation, bolt-linkage engagement, pin order and final check.

Select and install the Silverback VKS 0, +250 µm or +500 µm hop nub with the correct concave orientation and anti-jam checks.

Change the Silverback VKS main spring safely: control the spring guide, use the trigger to seat it and chronograph after reassembly.

Strip, clean and reassemble the Silverback VKS 63-BB magazine with a 5 mm pin, flat screwdriver and final follower-release test.