snip (I was going to respond on a case by case thing, but there is simply to much information being exchanged here and even I was having trouble deciding which are a to place which tidbit)
Sorry I should clarify. There are no assault rifles available to civilians. You are completely correct that there are rifles geared entierly towards warfare. That's not the scope of civilian assault rifle bans, they are exist primarily to ban military looking weapons. The problem with the Federal Assault Weapons bad of 1994 (the one that expired in 2004) was that there was no legal definition of assault rifles prior to the act, and they defined it in the act to pretty much mean any military looking weapon, It baned a large amount of semi-automatic weapons. Cost alone would be a major factor in keeping true military weapons out of the hands of civilians. Who has $5,000 to drop on a saw, even through the ammo isn't overly expensive. Other guns can run up to or exceed the price of a new vehicle.
Because you noted military weapons:
They typically trained us using the M240B in three man teams. The weapons for our purposes where used as suppression fire from a fixed location. The three man team worked with one person firing and the other two adding extra defense or suppression fire with there weapons. Once the belt has been fired they reload and swap the barrel. We would also train for two man teams, and turret mounted applications. With slightly different procedures. Other smaller weapons like the M60, and the M249 could be used in the same situations but where typically used by one person.
For 9MM:
The .22LR is a popular varmint rifle cartridge, and plinking round. It is occasionally carried for defense, especially for the weight, cost, and concealing. While the 9mm is probably the most common cartridge carried for defense. It combines the best aspects of a defense weapon. It's easy to steady during rapid firing, it holds a respectable number of rounds (even in compact sizes) it's concealable, cheap, and reliable, with an effective amount of stopping power. There is nothing wrong with carrying a 9mm for personal defense. You will find (in my case as well as your case) some opt for other cartridges, especially compact handguns chambered for .40 S&W and .45 ACP (except I was never a fan of a subcompact .45). I carry a Glock 27 (subcompact .40 S&W) for instance.
I never intended to imply that there was more energy behind a 9mm bullet then the 7.62x39, only that it was larger, and in the case of killing oneself it was equal to the task. The person I was responding to implied that you had a good chance of not successfully killing yourself with a 9mm and that it was a much smaller round. Sure he could have been talking about total cartridge size, but you never know. I do believe he is incorrectly taking "larger" to mean more powerful however.
7.62x39 for military applications tends to have either a 123 or 154 gr. bullet while 9mm tends to have a 115(common target load) to 145 gr. bullet. They are right around the same weight in other words, with the 7.62mm edging out a bit on the top.
Eclectic Dreck said:
I'm quite sure the post you are responding to is rubbish.
Yes it was, and in this part you noted hydrostatic shock without using the term. I was wondering if you where families with it. I have heard about the habit of the the .50BMG to shred targets and remove limbs and those I believe, cutting in half however is to much of a stretch.
As for the 5.56mm NATO round, you find different bullets for different applications. There will always be arguments about which one is superior, you can't even find many experts that agree fully. However the steel penetrator in the M855 sacrificed to much fragmentation potential for penetration, and is not panning out well under practical use. The bullet does not have a high hydrostatic shock potential either, which means that without reliable yawing and fragmentation the bullet does only minor damage when compared with larger rounds. The M855A1 is being shipped off to replace the M855 for these reasons. The Mk 262 round also addresses much of these concerns but has so far really only found favor with special forces units.
Eclectic Dreck" post="18.235279.8364973 said:
The law that prohibited new automatic rifles from being sold (The Assault Weapons ban) expired in 2004.
I mean this truly, and in no way sarcastic. I got my acts mixed up, and should have checked online before actually committing anything to writing. Thanks for correcting that. Not the only mistake I committed to writing here when I wrote this at 4 am.
Edit: forget to add close one little quote tag and it messes the whole post up.