question

[A Happy Camper]

what is the best size barrel to buy 1.5 2.5 etc

[drac]

Personal preference my friend, but it depends on what you want to shoot.

[MisterSteve124]

if you are going to shoot potatoes then 1.5inch. I have used 2inch but it is hard to find potatoes that big. Most of the ones you get in a bag will be too small.

[schmanman]

2" works just fine for me. the small potatoes work good, too. the smartest thing to do is to get threaded adaptors, so you can use different barrels. a female on the gun, the glue a male on each barrel.