M4 Rifle Information/Review


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Redlg155
January 1, 2003, 11:32 PM
Got this link from over at AR15.com by one of the posters. I didn't see it over here, but I thought it might be an item of interest as I'm not sure the poster comes this way.


http://www.mca-marines.org/Gazette/Dailey.html

One item of interest that I found was the drop in effectiveness of the 14.5" barreled M4 vs the 20" barreled A2.

You go from a max effective range of 550m point target/800m area in the A2 to 500m point/600m area.

Muzzle Velocities are 3100 vs 2970 fps.

I'm wondering if they based the change in max effective range of a point target from 800m to 600m based on velocity loss or purely mechanical range limits of the removable A3 carry handle sight.


Good Shooting
RED

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444
January 2, 2003, 12:26 AM
I would guess it was velocity sinc they were probably using optical sights.

Jeff White
January 2, 2003, 01:06 AM
Those ranges are right out of TM 9-1005-319-10 the operator's manual for the M16A2, M16A3, M16A4, M4 and M4A1. Based on iron sights. You have a shorter sight radius that magnifies the effect of a small error at longer range, you lose some velocity, and the sights will not mechanically adjust to the longer range because of the removeable carry handle. are all reasons to list the range that way but.....

They listed it based soley on the capability of the iron sights though, because they list the same max effective ranges for the M16A4 which has a 20" barrel but the same removeable carry handle.

Jeff

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