Ok, been working up other chapters for my upcoming Deathwatch campaign.
This is what I have been thinking of for the Raven Guard trappings, keeping in mind that they are the stealthy ones. The pattern seems to be that each chapter gets a choice of some sort of tool, be it a weapon or what have you, or an enhancement. So this is what I have got.
Icons of the Raven: Choose one.
Icon of the Swooping Raven: Add +3 to Pilot (Personal) tests.
Icon of the Avenging Raven: Add +2 to WS Tests
Icon of the Swift Raven: Add +2 to Movement
Stalker Pattern Boltgun: Raven Guard Battle-Brothers may choose to replace their standard issue Godwyn Pattern Boltgun with the Stalker Pattern with Stalker Rounds.