Thanks, I'll give that a go!
Go into your soldier customisation screen and press Y on any gadget, unlock or weapon to get more detailed information about it.
As an aside, you know the detailed unlock decription/picture you get at the end of the round - there doesn't seem to be an option to view these again unless i'm being stupid? On BC2 it used to be under the tab for "gadets and weapons"
Swear I've missed important descriptions that would help me understand weapons like the HMG, whilst running for a toilet break between rounds! Would be good to read them again when forgetful too
edit: Triangle for PS3 users.