An adimantium plated/Gold plated boltgun. Both are irreplaceable bolters granted to Octain from his past. From a fall comrade or a fallen Vet. (Guilded is from a vet, Adamantium from comrade from scout company)
Octain as a newly promoted 2nd company member is full of himself. A character of great zeal and grace. Almost a flower on the battlefield. Though he prefers a bolter in his hands he strives hard secretly to perfect all weapons in secret. To become the marine he needs to be, to someone who the Primach would be proud. That the Chapter Master could smile upon. His tactics in battle are not normal yet are conclusive. He follows the Codex as a set of guide lines that shape him and he follows him, yet finds his own meanings. Finds his own path that makes him who he is. He had (with the help with Techmarines and acolytes) a mask to show himself. Making himself a target in battle for his fellow brothers so most people focus him instead of his brothers. His selflessness will be the death of him one day.