rails on the pump handle - idiots!
Thanks for the compliment.
Actually the rail on the pump handle is phenomenally great.
First it's comfortable just as is.
Second it allows you to mount a vertical grip, which is a lot of fun when playing, and rock solid to hold and aim with.
Third if you want you can put on picatinney rail accessories or covers. There are a million different things you can do, and on one of mine I have the rubber guards many put on AR shrouds and it is seriously sweet.
Fourth it allows the mounting of different types of sites, including peep sights and adjusting them so they work for a paintball gun. Here's one of my Trracers with the BT sights we sell separately that were designed for the TM-15.
(I also have a vert foregrip on this which I love, and the spring feed from the SA-17).
As for velocity. I made it come out of the box in the 290's and it comes with a velocity adjustable bolt and long allen key for velocity adjustment without taking the barrel off.