Well, now there are two in my arsenal. Both have all the internal mods I could find to do. Both are shooting about 35-45 feet. Below is a link to some serious power. As far as asthetics go, my assault rifle has the individual chamber drum mod; my sidearm has a solid drum mod. Take a look through these pictures, I belive there are some good ideas towards successful barrel extentions. I have recently recieved some skepticism regarding the barrel extentions and how they are said to limt the range of the darts. The point of an extention on a gun like this is purely for esthetics, not accuracy; IT LOOKS COOL! Using a pipe with an inner diameter no less than the stock barrel, about an inch in diameter, should allow enough room for a dart to pass through unrestricted. This is why I recommend using aluminum tubing, it's thin and lightweight, whereas CPVC is thick, heavy and most times not straight. There's a good selection, as I found out, in a pair of crutches. You can also find it in many inexpensive, used sporting goods. As another alternative, aquarium cleaning tubes are a substantial plastic cylinder and make nice barrels; they come in several diameters and best of all they're cheap.