I really don't see how this can be called a world record one shot was fired over the chrono which was 300 fps ,
As we all know paintball guns vary in velocity some quite a lot .
When the gun was shot trying to achieve this world record it was not chronoed the shot could have come out at 350fps who knows ?
The only thing that was verified was the distance but at what velocity ?
For that reason i don't think this can be called a world record and i am surprised the Guinness book of records would have done it in such a slapdash manor.
Just my observations i just cant see it tell me if i am wrong .