I have a spyder pilot and i\'m looking for a bigger barrel (preferably aluminum) that would fit this gun and be the right size bore for Karnage paintballs, specifically Karnage Burn or Bite.There is no perfect barrel of paintPaint sizes will never be the same no matter the brand or anythingThe paint size will vary depending on the batch it was made, the humidity, if they were squashed a lil while in packagingThere are way to many factors to just relay on one barrel bore to expect the same outcome every timeThat is why most of the higher end markers have barrel kits with them so they can match the paint to the bore at the time they are going to playI recommend either a cp two part barrel kit with about three different backs or even a evil pipe kitThis is for people on a tight budgetif you have more to spend i would recommend a real good barrel like a ceramic, stiffi or something on that end with a ifit kit or python kit (python kit is cheaper and the ifit is just a copy of the python kit)If you have a lil more to spend go out for a full barrel kit like a freak kit or even better a deadly wind barrel kit with freak inserts (really one of the best barrels).Other related question