||10-13-2011 04:45 AM
As far as I know you can claim it from the shuttle requisitions officer at whatever rank. It's been a while since I last used it but I'm fairly certain I used it to complete The Vault on one of my alts and I run the Reman missions as soon as they become available so I can claim the Reman rifle at each rank for levelling with.
As soon as I make my escape from work I'll check when I get back. I have an LTC1 sat in ESD after the LTC promotion so it should give an accurate idea.