How about the Trijicon ACOG series?
Check this package out - VERY step at $900+, but check out the features:
http://www.trijicon.com/user/parts/products1.cfm?PartID=142
Lead Time: 20-24 Weeks
Details: ACOG 4x32 Scope with Yellow Center Illumination for M4A1 - includes
Flat Top Adapter, Backup Iron Sights and Dust Cover.
The TA01NSN was designed specifically for the US Special Operations
Command SOPMOD M4 Carbine. To meet their requirements, the reticle
bullet drop compensator and range finding stadia lines are based on
the trajectory of the 62 grain bullet from a 16 inch barrel,
flattop mount (Picatinny rail Mil.Std.1913).
Magnification: 4X
Eye Relief: 1.5 in
Exit Pupil: 8 mm
Field of View: 7.0 degrees
Length: 5.8 in
Weight: 9.9 oz
Field of View: 36.8 ft at 100 yds
Adjustment: 3 clicks per inch at 100 yds.
Tritium Activity: 100 milliCuries in one source
----
Has integral backup irons. Designed for 16" barrel in .223 - 16" or a little longer which will eventually be the length of my SU-16 - hopefully later in 2004 or early 2005 when KelTec upgrades my current rifle.
Or Bubba gets his hands on it
