These two particular Deathwatch members hail from the Ultramarines chapter as well as the Imperial Fists chapter respectively...
(Vote on these Marines at Cool Mini or Not!)
When I was painting these guys, I dropped the Imperial Fist marine on the floor and he exploded; left arm one way, right arm the other (with the Heavy Bolter!), his backpack another direction, and the body a forth! I was able to find all the pieces and assemble him back together, but I was still missing the left arm (Aargh!)
I spent the next hour going through EVERYTHING (including my clothes) trying to find the dumb thing! It finally turned up... and where do you suppose it was? On the base of the Marine! ROFL! (Grrrr!!!)
You can see the Heavy Bolter in Action below: