[equalitybeforethelaw]

This contract is for M-4 and M-16 automatic rifles.

You don’t want to put a scope any more powerful that 2x on a a straightleg infantrymans rifle. Otherwise you will keyhole his vision. Brits tried using 4x in Norther Ireland and found it to be sub optimal. They recommended based on their use magnification between 1.5 to 2x. This allow full vision with a slight bump up to the shooter in aim point. Currently, I believe we are using Trijicon 4x as the standard day optic on the M4/M16. With 5.56mm, don’t really understand the attempt to measure windage electronically, especially for an M4.

[Thurston_Howell_III]

Iron sights, put a round up a flea’s butt at 500 yards....

[SJSAMPLE]

3x - 4x is the Trijicon ACOG standard mag, depending upon the model.
I believe the USMC uses 4x in the TA-31RCO ACOG.
The magnifier for the Army Aimpoint M68 is 3x.

Above that, it should only be used on a dedicated rifle.

[OldMissileer]

You don’t want to put a scope any more powerful that 2x on a a straightleg infantrymans rifle. Otherwise you will keyhole his vision.

My Son-in-law, a Marine in a weapons Battalion, has a 3.5 power Trijicon ACOG on his duty M-4. Also has a AN/PEQ-16A laser/IR sight.

[Who is John Galt?]

You don’t want to put a scope any more powerful that 2x on a a straightleg infantrymans rifle. Otherwise you will keyhole his vision. Brits tried using 4x in Norther Ireland and found it to be sub optimal. They recommended based on their use magnification between 1.5 to 2x. This allow full vision with a slight bump up to the shooter in aim point.

I like the Weaver V3 (a 1x-3x variable, also recommended by JP Enterprises: http://www.jprifles.com/1.6.3.3_Weaver.php ). At 1x, you can see absolutely everything with both eyes open, and it's about as quick on the target (with the heavy reticle) as a red dot. If you need some magnification, crank it up to 3x, and you're good for two or three hundred yards (probably more, if your eyes are better than mine ;>)...