Barrel O rings

[Omicron]

where do you guys buy your barrel o rings? mine just crapped out on me...could i go to a hardware store and pick it up, or are they of special materials? I already used the 2 from an AGD parts kit. any help at all would be great

[PyRo]

If you don't want to just buy a whole parts kit, a paintball stores should have them, AGD online store probably has them.