Projectile having a delay-action firing mechanism

A rifle grenade having an orifice or passage with edges leading to the explosive charge thereof, comprising a tail tube and a nose fuze provided with a delay-action firing mechanism including a striker arranged along the axis of the grenade and protruding beyond the front of the grenade, a detonator carried by a barrel and associated with the striker so as to be fired when the front of the grenade meets an obstacle, a charge fired by the detonator and a striker blocking device with inertia unlocking on shooting of the grenade, the said device being intended to hold the striker and the detonator in a safety position so long as the grenade has not been fired and for a certain time after the shooting of the grenade, wherein the barrel is provided with an annular or otherwise suitably shaped element, made for example at least partially from stainless metal, attached to and protruding from the barrel to form a surface by which the latter in safety position bears upon the edges of the orifice or passage leading to the explosive charge of the grenade, the said annular element, when the barrel is in its safety position, bearing upon a first stationary abutment preventing the barrel from rotating in the wrong direction when it is released by the striker.