The white is nice and bright, and reminds me of an Imperial Stormtrooper. If I were you (which I'm not) I would add a few small areas of black trimwork to heighten that effect, then throw an Imperial symbol on there somewhere.
I agree with Bomberman on keeping the bipod - with that long of a gun, and with a red-dot sight, it may have actually been useful for stabilising while lining up a shot. However, I don't think you'll suffer too much from having removed it.
And finally, a bit of an OT rant:
It isn't SHOULD OF, it is SHOULD HAVE or at worst SHOULD'VE. That is one of my biggest pet peeves!!!!!That thing is sweet, but this probably should of gone in the modification/paintjob thread.
(This isn't directed at you personally chefdave - more of a general commentary to get it off my chest. This is one area that really bothers me - people often put an "of" where "have" should go. "Should of", "would of", "could of". It isn't correct, and it makes me want to smash my head against the wall!!!!!)