Abstract: Multilayer films and adhesive tapes that include such films, wherein the multilayer films include plasticized polyvinyl chloride and optionally one or more fillers.

Abstract: A linear bearing insert for the slide-receiver ways of a firearm wherein the slide is reciprocably attached to the receiver by a groove and tongue structure. The insert is in the form of a rod, preferably cylindrical, which is disposed in a groove, preferably the receiver groove, and which has a portion of its peripheral surface in sliding engagement with a partially cylindrical groove formed in the side of a corresponding tongue, such that the bearing surfaces in engagement are cylindrical rather than planar. After wear has taken place, causing objectionable play, the insert may be replaced by a larger size insert such as to compensate for wear and eliminate the play.

Abstract: A firing pin for a firearm, more particularly for a firearm provided with a gas-operated bolt and bolt-carrier, the firing pin being disposed slidably in a longitudinal bore in the bolt. The firing pin of the invention has its shoulder abutment, which limits the stroke of the firing pin, provided with longitudinal apertures, such as slots or holes, preferably disposed at an angle to the longitudinal axis of the firing pin, which provide passageways for the pressure gas operating the bolt-carrier and leaking along the stem of the firing pin. Carbon, or other dirt, is thus prevented from being deposited on the firing pin stem, more particularly at the shoulder abutment.