Does attempting to equip start a chain and allow the opponent to play a reaction before the equipment resolves?

Ruling: Yes, equipping is a normal activated ability that starts a chain and allows opponents to play reactions.

Sequence:

• Player activates the equip ability
• Chain starts, priority passes
• Opponent can respond with reactions (such as kill spells)
• If opponent kills the unit being equipped, the equipment will not resolve on that unit

Nuances:

• The opponent's reaction can kill the target unit before it gets equipped, causing the equip ability to fail to resolve properly