First I'd like to thank the Major for his quick reply. His logic on 7.62 mm penetration sounds good to me and his source materials appear to be better than mine.
I'd also like to say that I have a profound sense of awe and respect for minmax. I can't imagine what it would be like to go up against a BMP or BTR with an M-14. I don't envy him.
However, I feel compelled to argue my point about Apache further.
The U.S. has the M993 which was only recently developed and tested in 1996-97. It has considerable penetration, but would OPFOR machineguns have the same penetration? Their 7.62 mm machinegun rounds are different from NATO 7.62 mm rounds. Do they have a similar bullet to the M993 deployed (as shown in the game)?
Also, just to show you how much of an armchair general I am , I have a quote from Tom Clancy's _Armored Cav_ :
"...the Army Aviation Center at St. Louis, Missouri, has mandated that all new helicopter designs meet certain standards of maneuverability, ballistic tolerance against enemy gunfire, and load-carrying. For example, the AH-64 is invulnerable to 7.62mm projectiles, tolerant against 12.7mm/.50-caliber projectiles, and survivable (able to get home if hit in the power plant/drivetrain/flight-control systems) against 23mm high-explosive projectiles."
The book is older (1994), and I know its not the best source in the world, but everything I've seen backs up the statement that the Apache is able to take some hits from 12.7mm and 23mm rounds. Specifically, the engines are protected against 23mm rounds. Their inlets are covered, obviously to prevent ingestion of small arms fire. Even if one engine did take serious damage, the second engine is on the other side of the helicopter and should be enough to get home.
I've read that Apache's that have been shot down in combat are thought to have been brought down with SAM's.
Respectfully,
Carter