LP Spyder Xtra (I've spent way too much time customizing it but it runs 285fps @ 260psi)
-Machined body, bolt, striker, feedneck and grip frame
OTP G3 Barrel Kit
Since its a kit, any paintballs that are even decent quality without deformations would work great.
Accurate with right paint/barrel match
Bores too short
No install tool
Can't shoot through breaks
I got this kit used off eBay and was first impressed with the quality of machining. (except that the tard I bought this from used pliers on the smallest bore and completely mangled it too a point where its useless) The 5 bores are nice cause they will fit most paint fairly well, but they are too short. They are also fairly weak being thin aluminum and care has to be taken when taking them in and out.
I can say that I was quite accurate though and impressed the players I was with last time I used it. But I did have one chop (hopper at fault) and it subsequent shots were all over the place, accuracy was completely lost. It did not self clean at all (but based on design you wouldn't expect it to be able to anyways).
It is also fairly quiet with all the porting.
Great barrel kit, excellent for someone who doesn't want to spend too much on their Spyder (for me) but still give the accuracy of a barrel kit. Superb machining. If you can find it cheap, buy it, its worth it.