Actually Gewehr you and Mustang hit the nail on the head.
The M4 is a great weapon for certain situations. IMHO, the role the M4 serves is a great submachine gun. (Kinda like Gewehr said). And in that role, I think the M4 shines.
Small light, good rate of fire, good penetration, and good lethality at closer range.
But the long range performance sucks. Has anyone looked at the range at which the rounds stop tumbling on contact with a body out of a 14.5" or 16" barrel?
Since 5.56
reliably tumbles and fragments at velocities of 2700+ fps. The M193 drops below that at 105 yards out of a 16" barrel, and 90 yards out of a 14.5" barrel.
Using the m855 the range drops further, to 90 yards out of a 16" and 85 yards for a 14.5".
Now, to be fair, the lethal range is much longer, but really, a 55gr or 62gr round that is .22 cal doesn't really compare at the longer range
lethality wise to the 122-147 .30 offerings in the 7.62x39 & x51. Penetration is better in certain circumstances, but lethality is less.
But once again, this isn't all that important, if the M4 was kept to a role that is compatibly with its strength.
That leaves only 2 other real issues that have been mentioned - the direct gas impingment craps-where-it-eats system and the hanging of all sorts of "tactical" doodads.
The hanging of technical doodads really isn't the fault of the rifle, but really the operator instead. And many of those items are usefull, the m203, the surefire light, the acog, etc etc. I think the problem is when ALL the implements are added to the rifles at the same time. Thats when a lightweight carbine starts to weigh more than a FAL.
As for the direct gas impingment, I really don't have a huge beef with this. I prefer the roller delayed blowback, but that is just personal prefrence. And quite honestly, I only shoot at the range, I don't throw my rifles in mud, snow, much or anything else. I clean my rifle afterwards. So the DGI doesn't affect me, and I have *never* had an AR rifle jam on me. (ofcourse, I have not shot very many rounds through an AR, nor do I own one....yet.)
I would love to hear the opinions of those that actually have to use the carbine where it counts, on the front line, and hear what they think of it.
I.G.B.