I'm not seeing your point.
What is the material difference between this military issue M24 sniper rifle...
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...and this extremely popular Remington 700 deer rifle...?
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en.m.wikipedia.org
You should start a thread if you are looking for that answer. This thread is about the M4 and the AR15.
Figure it out, Einstein
AR-15 vs. M4 are two varying rifles with striking similarities. AR-15 is easily accessible to civilians. Whereas, the M4 is fully automatic.
www.custom-ar15.com
That is the only attempt at an answer in the entire thread.
1. Barrel - The M4 has a shorter barrel, and is shaped to receive a grenade launcher.
2 Ammo. - The Ar15 can be chambered for several different shells, but the M4 is only capable of 5.56.
3 Automation - Until 1986, both rifles were legally capable of full automatic fire, but the AR15 was modified in 1986. Conversion back to auto fire is neither hard or expensive, but is illegal. ------------this was noted in the OP.
4 manufacturer
5. legality. This has been discussed, but is not a material difference in the guns, or the way they work. other than the already mentioned full auto capability.
6 Category. This is how they are referred to on paper, and has nothing to do with material differences between the rifles, other than the auto capability.
You did point out that the barrel is shaped a little different, but the purpose of that was to attach grenade launcher. Hardly a material difference in the accuracy, speed, or capability of long term continuous use. You got anything else to add to your list? The rest of the differences in your link are really just distinctions without any real differences.
Yeah...other rifles are also convertible to full automatic fire....
See the North Hollywood shootout where the rifles were converted to fully automatic fire...yet, in the shootout...the two robbers, firing fully automatic at the police didn't manage to kill anyone.....both, however, were killed by police using semi-automatic weapons...
So again, it isn't the weapon, it is the target location...in the North Hollywood shootout, the people they shot at were in the open, not in a building, and were behind cover.....so no one was killed by the fully automatic rifle fire.....however, again, both perps, even with their fully automatic rifles, were killed by police with semi-automatic weapons....
It isn't the weapon, it is the target location that makes all the difference....
Case in point...the 1984 FBI shooting, the two criminals had a mini-14 rifle, a semi-automatic rifle, and a pump action shotgun.....they managed to kill 2 FBI agents and wounded 5 others......
Again, it isn't the weapon, it is the target location.....in this case, the shooters were good shots.......the FBI weren't so good...
I am curious as to your point...where you would like to go with this....