Spark Double [War of the Spark] The Brothers' War and each trooper is equipped

and each trooper is equipped with an assault rifle with a bayonet

You have guessed correctly

Set: Friday Night Magic 2004 Type: Creature — Human Knight Rare Cost: {W}{W} First strike

You get an emblem with "Creatures you control get +2/+2 and have trample

Spark Double [War of the Spark] The Brothers' War and each trooper is equippedSet: War of the Spark Type: Creature Illusion Rare Cost: {3}{U} You may have Spark Double enter the battlefield as a copy of a creature or planeswalker you control, except it enters with an additional +1 +1 counter on it if it's a creature, it enters with an additional loyalty counter on it if it's a planeswalker, and it isn't legendary if that permanent is legendary.