I have recently bought a Bt sa 17 pistol and I was wondering whether I can use at Delta Force (in Upminster to be precise). The gun itself uses 12 gram co2 cartridges. I know Delta Force say that they don't allow you to bring your own marker on their website but I was reading a post on this forum from 2007 asking the same question and someone named Gups who claims to be a Marshall their answered: "I have now had a chance to speak to our H & S manager. We are now looking into the popularity of paintball pistols and if there is a reasonable demand will will do a risk assessment and put procedures in place to allow their use. With regards this particular gun, we agree that it poses no risk of a 'bottle rocket', as does valved cylinders, so we are prepared to allow it's use provided the following rules are adhered to: 1. You let me know what date and centre you have booked so i can inform the centre manager of your arrival. I will need to know this a week before your game via email email@example.com. A post on here will not be adequate. If you just turn up at the centre without informing me by email you will be told you cannot use it." Since this was so long ago I was wondering if their were any marshalls from Delta force that I could contact ? Cheers, James.