just a word of the wise, never build a gun if you don't know what you're doing. As mentioned previously airsoft tolerances are shit, so changing out stock parts for aftermarket or other brands WILL cause headaches and waste money.
This is not real steel where assembling a gun from scratch can be cheaper.. this is airsoft. Buy the gun configured the way you want from the start.
Also a short barrel can be made to perform as well as a long barrel. Conversely, a long barrel can be made to perform as shit as a short barrel. This is airsoft, projectiles are not gyroscopic ally stabilized by rifling. BBs are lofted with backspin. So your precision is a factor of the consistency of air seal, backspin application, spherical trueness of the projectile, consistency of weight and consistency of balance of the projectile.
Barrel length has less to do with it than most would suggest.
I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.
Last edited by lurkingknight; June 18th, 2015 at 17:56..