A rifle comprising a housing, a barrel anchored thereon and a forearm extending below the barrel. The barrel is anchored by a fastening element which extends through a cross hole of the housing. The forearm has at least one axial projection that detachably engages into a seat of the housing. The cross hole for anchoring the barrel and the seat for fastening the forearm intersect and the forearm comprises a snap-in recess for the fastening element to snap in when the barrel is anchored.