Which rail/gasblock should I get once I remove my FSB?

[Shotdown]

I have an LMT 16" rifle (carbine) and I have a Troy MRF-DI 7" rail on it now. I want to remove my FSB and get a longer rail. I'm also adding an AAC M4-1000 suppressor. So my question is, which rail and gasblock should I get? I was thinking about a DD Omega 9" rail but I don't know how that would look on a 16" barrel. Please help.

[spamsammich]

I run a 12" Lite rail with a DD clamp on low pro gasblock and a 10" Lite rail with the same gas block on a different rifle. to run with a 9" Omega, you would need a very low profile gas block like a shaved FSB or a Vltor low profile. I don't think the DD clamp on will clear a 9" Omega, It might fit under a 12" Omega.

it would look something like this: LMT 14.5" upper mock-up.

http://web.me.com/supermarkus/iWeb/Site/New%20upper%20options_files/IMG_1965.jpg