put mine together as well, some aren't really good, I will post my personal favorite at the bottom:
405th-We made Cortana wet herself
405th-the reason life insurance became viable
405th-we put storm troopers out of business
405th-give us a factory and we'll make world peace
405th-dirka dirka Jihad got nothing on us
405th-why aren't we in Iraq?
405th-save a storm trooper, send a spartan
405th-the old man down the street will never call your costume a "nice space-man" suit again
405th-guaranteed e-penis enlargement by 500%
405th-"look Ma, Ima master chief, yeeeehaaaaaw"
405th: mjolnir armor, t-bagging sold seperatly
the ones I like the most out of mine:
405th-We made Cortana wet herself
405th-why aren't we in Iraq?
405th-save a storm trooper, send a spartan