Immutable Form. The clockwork is immune to any spell or effect that would alter its form.

Magic Weapons. The clockwork's weapon attacks are magical.

Magic Resistance. The clockwork  has advantage on saving throws against spells and other magical effects.

shield trait.if both shields  are up, the clockwork gains+4 ac and loses the Multiattack  and attack action. If one shield is up, the clockwork can make only 2 attacks. the clockwork loses its flying speed if one or both its shields are up. 

gnomish design/explosive parts:the commando was designed by gnomes, and is therefore quirky and explosive. If the clockwork takes 30 or more damage in one hit, part of it explodes.the attacker picks either the wings, an arm, or a leg to combust.If the arm combusts, the clockwork may only make 2 attacks a turn. If the wings combust, the clockwork losses its flying speed.If the legs combust, the clockwork losses its walking speed, and can not hover.

self destruct: If you issue the command "self destruct", the clockwork explodes at the start of its turn, dealing 4d8 bludgeoning and 4d8 fire damage to every creature within 30 ft of it..It is disintegrated into a pile of fine dust, and can not be rebuilt 

Multiattack:  the clockwork can make 3 weapon attacks, or 2 if 1 shield is up.If both shields are up, the clockwork can not attack.

+1 rapier. Melee Weapon Attack: +9 to hit, reach 5 ft., 1 target. Hit: 11 (1d8 + 6)slashing damage. 

+1 increased damage short bow. Ranged Weapon Attack: +9 to hit, range 80/360 ft., 1 target. Hit: 11 (1d8 + 6)piercing damage.