An attachment module for a firearm, in particular a gas-pressure gun, with a gas-inlet chamber , a plurality of barrel-type gas outlets which are fluidically connected to the gas-inlet chamber , wherein the gas outlets run at an angle in relation to a longitudinal axis (LA) of the attachment module , are arranged distributed in peripheral direction about the longitudinal axis (LA) and have a respective gas-outlet opening, a net-receiving chamber separated from the gas-inlet chamber and the gas outlets , wherein the gas outlets are arranged distributed in peripheral direction about the net-receiving chamber and wherein the net-receiving chamber has a net-outlet opening, an interception net which is connected to a plurality of projectiles , wherein the number of projectiles corresponds to the number of gas outlets , wherein the interception net is accommodated in the net-receiving chamber and a projectile is inserted in each gas outlet , wherein the projectiles are designed such that they are substantially synchronously driven through the respective gas outlet by a gas pressure built up in the gas-inlet chamber and pass out of the respective opening, with the result that the interception net is withdrawn from the net-receiving chamber and unfolded in mid-air, wherein the projectiles have a contact section , the entire surface of which is in contact with an inner peripheral surface of the respective gas outlet , wherein the contact section has a diameter which is greater than the diameter of the rest of the projectile , wherein the contact section guides the projectile into the respective gas outlet , characterised in that , the contact section is formed from polytetrafluorethylene (PTFE) or is coated with polytetrafluorethylene (PTFE). a gas-inlet chamber , a plurality of barrel-type gas outlets which are fluidically connected to the gas-inlet chamber , wherein the gas outlets run at an angle in relation to a longitudinal axis (LA) of the attachment module , are arranged distributed in peripheral direction about the longitudinal axis (LA) and have a respective gas-outlet opening, a net-receiving chamber separated from the gas-inlet chamber and the gas outlets , wherein the gas outlets are arranged distributed in peripheral direction about the net-receiving chamber and wherein the net-receiving chamber has a net-outlet opening, an interception net which is connected to a plurality of projectiles , wherein the number of projectiles corresponds to the number of gas outlets , wherein the interception net is accommodated in the net-receiving chamber and a projectile is inserted in each gas outlet , wherein the projectiles are designed such that they are substantially synchronously driven through the respective gas outlet by a gas pressure built up in the gas-inlet chamber and pass out of the respective opening, with the result that the interception net is withdrawn from the net-receiving chamber and unfolded in mid-air, wherein the projectiles have a contact section , the entire surface of which is in contact with an inner peripheral surface of the respective gas outlet , wherein the contact section has a diameter which is greater than the diameter of the rest of the projectile , wherein the contact section guides the projectile into the respective gas outlet , characterised in that , the contact section is formed from polytetrafluorethylene (PTFE) or is coated with polytetrafluorethylene (PTFE). <EOS>