Noise generation device

A gun attachment operable to simulate the noise of a gun, the gun attachment comprising:

• a housing defining a sealed chamber, the housing comprising a wall member moveable between a sealed position and an open position, wherein in the sealed position the chamber is fluidly sealed and in the open position the chamber is open;
• an injection assembly for injecting combustible material into the chamber;
• a triggering assembly for triggering the combustible material to combust inside the chamber to generate a noise;
• wherein the moveable wall member comprises a sleeve adapted to slide longitudinally, between the sealed position and the open position, along a sleeve guide spaced from a body portion, and wherein in the sealed position the sleeve abuts the body portion and spans the space between the body portion and the sleeve guide such that the chamber is defined at least by the sleeve guide, the sleeve and the body portion, and in the open position the sleeve is spaced from the body portion to open the chamber;
• wherein the gun attachment is configured to allow exhaust material to exit the chamber after combustion, in that the moveable wall member moves from the sealed position to the open position on combustion of the material inside the chamber to allow material to exit the chamber;
• and
• wherein the gun attachment is configured for attachment to a gun.

A simulation weapon, comprising:

• a housing defining a sealed chamber, the housing comprising a wall member moveable between a sealed position and an open position, wherein in the sealed position the chamber is fluidly sealed and in the open position the chamber is open;
• an injection assembly for injecting combustible material into the chamber;
• a triggering assembly for triggering the combustible material to combust inside the chamber to generate a noise;
• wherein the moveable wall member comprises a sleeve adapted to slide longitudinally, between the sealed position and the open position, along a sleeve guide spaced from a body portion, and wherein in the sealed position the sleeve abuts the body portion and spans the space between the body portion and the sleeve guide such that the chamber is defined at least by the sleeve guide, the sleeve and the body portion, and in the open position the sleeve is spaced from the body portion to open the chamber;
• wherein the simulation weapon is configured to allow exhaust material to exit the chamber after combustion, in that the moveable wall member moves from the sealed position to the open position on combustion of the material inside the chamber to allow material to exit the chamber.