Anyone could have a go, many different markers were used (although they have to be factory markers and paintballs), ten shots per player. Limit was a witnessed 300 FPS, video taped. Target was a 60cm x 60cm paper target, the paintball had to break the paper to count as a hit.
Anyone who wants to have a go can have a go at any of the Super 6 events (although I would imagine you have to buy a ticket), they will be attempting the record at every game. Why don't you come down and have a go Robbo?
I'm pretty sure they're the facts, although as i am not an organiser I am happy to be corrected.
To be honest it's all a bit of harmless fun and shouldn't be taken too seriously. However it is an Official Guinness World Record. At the moment.