I thought this was pretty awesome! It is a 12 gauge flash BANG shell
This shell was developed as a stun/diversion round used for riots or in clearing a building for law enforcement. When fired this rounds makes a loud bang and a bright flash to stun someone, when fired, the concussion and explosive blast is directional and produces between 175-182 db. Testing showed no penetration in 10% ballistic gelatin at 8 feet.
The round is similar to a diversionary grenade (a flash-bang) and designed to be aimed at the floor or ceiling at a 45 degree angle and never intentionally at a person or object.
This round should to be used with screw in chokes.