Which of the leading service rifles would you pick if given a choice? Feel free to explain why.
Well, if given a choice of those rifles, I have three main calibers to chose from: 5.56x45mm, 7.62x39mm, and 7.62x51mm. Assuming I have to actually use this rifle for an extended period of time to possibly: hunt, defend myself and my family, or (in the spirit of "Red Dawn") take back my corner of Cimarron NM, (where the movie was actually filmed) I'd need a general all-around cartridge that could do most anything. This weapon, and its round of choice, would be called upon to perform many tasks from dropping most kinds of North American game such as whitetail, muley's, turkey's, and other types of small game and four-legged vermin, to effectively stopping two-legged vermin types. This round could also be called upon to penetrate barriers such as car windshields, common housing materials, etc. (once again, assuming I am completely on my own, and someone attempts to run me off the road, break into my safe shelter, or perform some other equally nefarious act. Think it can't happen? Watch the one and a half seasons of the CBS show Jericho. Yes, it's only TV, but every once in awhile they get things right.) Also, since I would be, in essence, by myself, the round would have to be light-weight enough to allow me to carry significant amounts on or about my person (vehicle perhaps) without grossly fatiguing me.
That qualification, unfortunately, rules out 7.62x51mm. I don't want to hear any arguing about it! If you think you can carry combat loads of 7.62x51mm over great distances and still maintain exceptional situational awareness and the ability to outmaneuver a foe...you should ruck up, get that battle rattle on and go try it for a weekend. I'm serious. Granted, you get weird looks walking along the Appalacian Trail with nearly full battle rattle but it surely shows you your limitations. (- 12lbs...I left the rifle at home, weapons on the AT are a touchy subject)
Remember though, this round also has to have enough punch to not only kill most types of game animal found in North America, but also to successfully penetrate barriers, whatever they may be. And while the 5.56x45mm round is very lightweight, and has a decent track record, I do not have enough faith in it to be an all-purpose round. The bullets are too light, even the 77gr ones, for me to want to take a shot at anything larger than a coyote. Yes, I know whitetail can be taken with the 5.56x45mm round, but think of the scenario: you're hungry, tired, scared, probably pushed well out of your comfort zone, and who knows how many other factors are effecting you at that moment in time. When you go to take that shot at what potentially could be dinner, do you want to take the shot and then have to potentially track a wounded animal for who knows how far through the woods? Say you are in a vehicle moving towards better hunting grounds, or trying to link up with family or friends and someone attempts to force you off the road. Do you really trust that little 5.56x45mm round to have the ability to punch through the windshield of a car and incapacitate the driver, or introduce enough foreign mass into the engine of the vehicle to cause a catastrophic failure? Personally, no, I do not. I think the 5.56x45mm round is a great round for plinking, small game, and general light duty, but if cast into a scenario where my rifle is my life, I think it leaves much to be desired.
No I am not trying to say that the 7.62x39mm round is perfect, a wonder round, or that the weapons platform that delivers it is perfect for every situation, but I do think that the system provides the best of both worlds: relatively light weight for increased ammunition carrying capacity while still maintaining significant lethality in a compact, light weight (When compared to most 7.62x51mm systems) reliable, easy to use and easy to maintain platform. No disrespect to the AR system, I am a big fan, its ease of use, inherant accuracy and ergonomics are hard to beat, yet I think its round needs an upgrade. I will readily agree that out of their respective platforms, the 7.62x39mm round has nowhere near the range of the 5.56x45mm round. To this I counter: if I am in all out survival mode and a threat appears outside of my engagement range I will pound sand and vacate the area before he can find, fix, and destroy me. Depending upon the scenario, once I have removed myself from his LOS and LOF, I will then proceed to either avoid his last known location like the plague, or close with the target until I am within the operational parameters of my system. I will also agree that in their familiar guise, the 5.56x45mm round and platform is far more accurate than that of the 7.62x39. However, with enough practice, the AK-47/AKM family of rifles is in fact quite shootable with a fair degree of accuracy. Probably more accuracy than most of us are capable of shooting...I mean, really shooting. From combat-type positions, after a hard run, or when you're scared or angry. So while my choice is not perfect, and has flaws, I think it provides the best of both worlds. My vote goes to the AK-47/AKM family of rifles.