This is a short one, since I believe there's no two ways about it (pun intended, yuk yuk yuk)
Two-piece barrels are a rather recent hype introduced to the market. They claim that by having two different materials, you are getting "the best of both worlds", "exceptional accuracy", etc, etc. Let me say that most manufacturers outright lie. Plain and simple. Look for your info from people who have tried the products or from consumer report type things.
There are a couple problems with two or more piece barrels. One being that no matter what, there is a seam where the two pieces connect, creating drag, and a higher possibility for ball breaks. This is, here you go kiddies, listen up, a BAD thing. Bad means don't buy me...
The other thing is that the two pieces are usually, in every case I know of, a different bore. They tell you this lets you shoot a wide variety of paint sizes. Even if this was a sound theory, you would be able to shoot a wide variety of...two...paint sizes. This is also, BAD. This means, only half the barrel is helping you out, the part that's your bore. The other half didn't help anything but the salesman's wallet...
Two piece is just another gimmick. All it does is make you more apt to spend twice the money for half the performance.
Stay one piece. All the best working barrels, Lapco Autospirit and Bigshot, Dye Aluminum, J&J Ceramic, are one piece.
Oh yeah, you'll hear or say, "then why do the pros use two piece, huh?". Hrmm... who made that 2 piece? Hrmmmm...who's name's on the jersey? Hrmmmm...who's getting payed to shoot that barrel made by the name on the jersey....
Don't fall for the hype...
-Captain Clay
