How and why does a longer gun barrel improve its performance, as on a tank? - Quora

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Why do some new guns, especially rifles, have little ridges or grooves on the top of them? - Quora

Why did some German tanks and Soviet artillery pieces have muzzle brakes? Did it improve the canon's performance? - Quora

What are the advantages of a tank's gun having a long barrel and a tank having a short barrel? - Quora

Do tanks have two barrels instead of one big one? - Quora

Why short barrel rifle (such as 7.5') have more louder and recoil than long barrel rifle? - Quora

How much longer can an M1 Abrams stay operational than another main battle tank? - Quora

What are the big barrels or cylinders on the back of a T-90 tank? - Quora

How effective were anti-tank rifles in WW2? - Quora

Is there such thing as a long barrel being too long? - Quora

What has changed on tank turrets since WWII? - Quora

How and why does a longer gun barrel improve its performance, as on a tank? - Quora

Can a sniper trigger explosive reactive armor on a tank? - Quora

It seems like nearly all SMG's were designed to fire LOTS of pistol cartridges really fast, but are there any SMG's that fire longer rifle cartridges? - Quora