Empire twister (better but more expensive)
Aradus (it's a whole barrel kit in one barrel)
Smart Parts Ion modified to feed from bottom of the gun. (-:
Empire barrel kit
Hand customized single finger trigger with single trigger guard
Apex Barrel (haven't used it yet)
Cheap, accurate, nice military look.
This is one of the best barrels you can put on a spyder, good accuracy and low price. If you want a rifled barrel that is a little better go for the empire twister. Also the psycho ballistics aradus is a great barrel and if you can buy it used for $35 i would go with that but this CMI is also good.
Good all around barrel for woods ball and speed ball. and for $25 it's a good buy.