Abstract: A barrel assembly for use in a firearm that reduces the static bond due to propellant pressure between the cartridge case and the barrel chamber. The barrel assembly has a barrel with a rifled bore, and a chamber for receiving a cartridge therein. The barrel chamber having a throat portion adjacent the rifled bore, and the chamber also having a body portion for receiving the cartridge case therein. The cartridge comprising a cylindrical cartridge case, a bullet engaged within the cartridge case. The cartridge case contains a propellant producing a propellant pressure upon ignition of the propellant. A barrel sleeve configured to receive the barrel within and to positively engage the barrel. A recess is formed between the barrel and barrel sleeve, forming a propellant pressure interconnect passage.

Abstract: A barrel assembly for use in a firearm that reduces the static bond due to propellant pressure between the cartridge case and the barrel chamber. The barrel assembly has a barrel with a rifled bore, and a chamber for receiving a cartridge therein. The barrel chamber having a throat portion adjacent the rifled bore, and the chamber also having a body portion for receiving the cartridge case therein. The cartridge comprising a cylindrical cartridge case, a bullet engaged within the cartridge case. The cartridge case contains a propellant producing a propellant pressure upon ignition of the propellant. A barrel sleeve configured to receive the barrel within and to positively engage the barrel. A recess is formed between the barrel and barrel sleeve, forming a propellant pressure interconnect passage.

Abstract: Adhesives are disclosed which include a methacrylate copolymer, wherein the methacrylate copolymer includes at least one methacrylate monomer component and at least one acrylic or silicone monomer component, and wherein the adhesive are gamma resistant. The adhesives may include about 45% to about 49% by weight acrylic or silicone monomer component, about 45% to about 49% by weight methacrylate monomer component, and about 2% to about 10% by weight acrylic acid or 2-hydroxyethyl acrylate. The adhesives may further include at least one additive selected from the group consisting of a plasticizer, a tackifier, a cross-linking agent, an antioxidant and combinations thereof. The adhesives may be a pressure-sensitive and low trauma adhesive. Also disclosed are medical devices including the adhesives.