Bought one of these the other week at the Sandpit. Absolutely cracking piece of kit, went off every time I used it and very good build quality - seems like it'll last a while. Once they bring out the shotgun primer base it'll be cheap as chips to deploy (pretty cheap already - the BFG + 25 9mm blanks works out at something like £2.50 a throw, only going to get cheaper). Would highly recommend.