With the understanding that the following is just one man's opinion...
From Glamdring: *Reliable - check; *Ergonomic - check; *Quick reloads - check.
From Golgo-13: *black - check; *endorsed by ops - check; *high speed/low drag - check (note 100mph tape somewhere on weapon); *featured with other tac gear - check; *still black; *thigh holster available - well, it has a tac sling; *movie use - check; *still black; *video use - check; black as midnight!
From Double Naught Spy: *blackness as an art form - check; *hand held - check; *What is tactical? "of or having to do with tactics" "characterized by or showing cleverness and skill in tactics" - check.
From LBC: *adequate caliber - check.
From David Scott: *powerful enough - check; *accurate rapid fire capability - check; concealable - why?; *low light sights - check (note red dot); *capacity/firepower - check (note 30 round mag); cited as "ultimate" in a gun rag - OH YEAH!
From Halffast: *be a rifle - darn skippy!
Items not previously covered: *self contained, easily operated, extremely bright (blinding) light source - check; multiple sighting systems (back-up) - check; as many adjustable features as possible for mission variability - check; *black in color - check; *universally labeled as being "evil" or "banned" by most governmental agencies and the media - in SPADES! Last, but not least, it MUST be BLACK!!! - check...
Ladies and gentlemen, I give you the most unversally recognized number one choice for tactical weaponry in the world today:
Mikey