QUOTE (Epicedion @ Apr 4 2011, 12:49 AM)

As with reality, guns tend to be really freaking similar. What's the difference between a Glock 17 and a Beretta 92FS?
Rage! The big differences are weight, reliability, recoil characteristics, trigger pull, and which one feels more comfortable in your hand.
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What's the difference between a USP .45 ACP Compact Tactical and a WW2 vintage Colt M1911?
RAAAGGEEEEEE! Firstly, reliability. Secondly, durability. The vintage 1911 is going to be made with a softer steel and won't last for as many hundreds of thousands as rounds as the USP before the slide starts to crack. A true vintage 1911 will also be made with loose tolerances and will probably be less accurate than the USP, and more prone to failures especially when using hollow point or other speciality ammunition.
Thirdly, especially if we're talking about modern 1911s, a slender, comfortable grip, and a crisp trigger pull, and a safety you can ride. Why is it that all the top USPSA competitors shoot either glock or 1911 variants, and none of them shoot USP? Because the ones that they do use are better in all the small, right ways to make the difference between a champion and second place. I cannot believe you are even making a comparison between a USP and a 1911. They're completely different beasts which are used today by people with completely different things that they want from their weapons.
Have you ever tried to ride the decocker on a USP? As a 1911 shooter I've done that in the past. The result is causing a malfunction of the USP. The USP has got a characteristic Euro-wuss mushy trigger pull, and a huge part of the reason someone would use a 1911 instead is because they want a nice crisp trigger pull.
I really cannot believe you said they're similar.
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Same goes for rifles: AK-47s and M-16s have their own distinctiveness and what could arguably lead to a well-reasoned argument on the pros and cons for either, but by and large the differences evaporate after two bullets go into the target.
RRRAAAAAGGGGGEEEEEEEEEEE! There's huge differences between the weapons! Reliability, and accuracy for the 400 yard headshot. Trauma and wounding, and penetration of solid objects, are all going to be different based on the different cartridges used by the respective rifles.
The M-16s nowadays come with nice accessories, but with an old AK 47 you're going to have to duct tape them on. This would really affect how easy it is to use the weapon and longer and longer ranges if you start adding the expensive optics.
The AK is a lot shorter than a full length M16 and is probably easier to use indoors. I would feel a lot more comfortable using my AK as a melee weapon than I would my AR.
With my AR I baby it a little bit. With the AK I use it cheerfully content in the knowledge that since it's not that accurate in the first place I don't need to stress as much when running around with it. I have a bayonet for the AK but not for the AR.
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But the functional difference between getting shot with an M-16 or an AK-47 (or two different pistols) is, considering the amount of variability inherent in the SR system, going to be pretty small. Large gaps (light->heavy pistol, SMG->assault rifle) are mostly covered already.
See, if you really wanted to do it right, running a crisp high end 1911 would let you shoot just a little earlier than you normally would in the turn, representing superior handling and a crisp trigger pull, but then there'd be a 1% chance every time you pulled the trigger of getting a type 2 or type 3 malfunction.
The USP would have a lower chance of malfunction but that mushy trigger pull would not boost your initiative.
If you were running a Sig 226 and you fired your first double action shot, you'd take a very slight penalty to your initiative to represent the looooonnnngggg trigger pull and the need to adjust your finger position.