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 of the attachment module, are arranged distributed in peripheral direction about the longitudinal axis 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built up in the gas-inlet chamber and pass out of the respective opening, with the result that the interception net is withdrawn from the net-receiving chamber and unfolded in mid-air, wherein the projectiles have a contact section, the entire surface of which is in contact with an inner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 of the attachment module, are arranged distributed in peripheral direction about the longitudinal axis 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).