From Destinypedia, the Destiny wiki
Resilient Captains are a more durable and powerful variant of the Captain seen throughout the Solar System. They can be distinguished from their Minor counterparts by their silver or gold armor and cloth.
Resilient Captains have noticeably tougher shields and thicker armor than regular Captains, as their name entails. They are almost always seen with Molten Welders, which are Fallen-made rocket launchers with very fast muzzle velocity, a large blast radius, and high damage output. They can also be seen with Shrapnel Launchers, although they are more accurate than those used by regular Captains. Arc damage is the most efficient way to deal with these enemies, as it will deal bonus damage to their energy shields.
List of appearances