Flasc Paintball Barrel Kit
With the quasi-demise of Smart Parts, a barrel kit vacuum has been created in the industry. Enter Flasc Paintball. These guys are serious about the science of paintball, and they have done exhaustive testing to create the optimal barrel kit.
Milsim Barrel Kit Intro Video
With competitive pricing, a ridiculous number of options, overboring kits, underboring kits and a great business model (and they're Canadian!), these guys are going far. Get in early, and check out Flasc Paintball's Online Store.