12 Jul 2019
Masterful Replication copies the printed values of the target artifact. It won't copy counters on that artifact or effects that have changed its power, toughness, types, color, or so on. Notably, it won't copy effects that made the target artifact become an artifact creature if it isn't normally an artifact creature.
12 Jul 2019
An Equipment that becomes a copy of a creature becomes unattached if it was attached to a creature. An Equipment that becomes a copy of another Equipment remains attached if it was attached to a creature.
12 Jul 2019
If the target artifact is copying something else, then your artifacts become copies of whatever the target artifact copied.
12 Jul 2019
Becoming a copy won't change whether an artifact is a token.