Originally Posted by ratking20
if my one piece barrel is v1 or v2?
i ordered it from their site probably 2 years ago
If your barrel has no size stamped/lasered on it, it is a V1. If it does have the size on it, try checking to see if the bore is the same all the way through. Good calipers if you have. Maybe drop a small paintball in from the tip side, see if it gets stuck part of the way down?