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barrel length increases accuracy not range.

It increases range also.

not it doesnt, it allow for different bullets which may contain more gun powder but it you fired the same bullet from a regular M-16 and a short barrel M-16 they will both travel the same distance as the bullet is subject to the same thrust, friction and gravity forces which ultimatly determine the max range. however the longer barrel contains more coils giving the bullet more spin enhancing accuracy. to increase range you need more thrust or reduced friction or mass of the bullet none of which has anything to do with barrel lengh

==Actual Answer== Please do not speak if you do not know what you are talking about. It is a well known fact that barrel length increases range, that is a big reason they use them on sniper rifles. Seriously, it is laughable that you would try to speak against it when you have not even tried to research it, everyone in the firearms world would laugh. The longer barrel allows for the expanding gases to have more time to accelerate the bullet down the barrel, and increases the muzzle velocity, which in turn allows the bullet to travel farther. I hope I don't have to describe why a faster muzzle velocity increases the range as well.

Now as for accuracy, I have not read anything yet that really gives me a good reason besides "it should." I'm going to leave it up for grabs for now to be interpreted either way, but as of now, I have not found sufficient evidence that barrel length greatly affects accuracy. If anything, a longer barrel will allow for more vibration which can slightly lower accuracy. Most of accuracy is up to other factors in the gun, like rifling for example.

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