If you're still looking around for this, you can now find it Airsoft GI... "The Madbull GSG-1 Distraction Device is the best distraction tool for MILSIM or CQB. The GSG-1 is a CO2 filled canister designed to release a loud 'POP' when the gas is expelled by the time released valve. The GSG-1 is capable of reaching 120db right at the cusp of the valve, which is the equivalent of standing on the runway when a plane is taking off!