Airsoft gun Barrel length affects accuracy?

Question

I was wondering if the length of the barrel of an Airsoft gun effects the overall accuracy of the gun. Another thing was, are the barrel lengths even that different? I'm undecided between an Echo G36C, an Echo Mp5, or an Echo M14, seeing as the M14 has the longest barrel, and is the most expensive, I would prefer not to buy it, but since accuracy is essential, I'd like to know how much the length affects it. Thanks.

Answer 1

Because the only determining factors in the tragectory are muzzle velocity, spin, and the last little bit of the barrel, the only advantage of a longer barrel would be to take advantage of more of the compressed air available.