A method is disclosed for coating a projectile for use in an ammunition cartridge. A polymer jacket is applied to an undersized projectile core of a first standard caliber to bring the outer dimensions of the jacketed projectile into compliance with those of a second, larger caliber projectile. The polymer jacket coating may produce a non-uniform outer diameter of the polymer jacketed projectile and may include a plurality of circular cavities defined therein. The polymer-jacketed projectile may be a bullet for pistol or rifle ammunition, or a pellet, or shot for use in a shotgun shell.

A method is disclosed for coating a projectile for use in an ammunition cartridge. A polymer jacket is applied to an undersized projectile core of a first standard caliber to bring the outer dimensions of the jacketed projectile into compliance with those of a second, larger caliber projectile. The polymer jacket coating may produce a non-uniform outer diameter of the polymer jacketed projectile and may include a plurality of circular cavities defined therein. The polymer-jacketed projectile may be a bullet for pistol or rifle ammunition, or a pellet, or shot for use in a shotgun shell.

Articles having a hydrophobically-coated region and processes of using such articles are disclosed. The article includes a substrate material and a hydrophobically-coated region on the substrate material, the hydrophobically-coated region being contacted or configured for contact with a fluid. The hydrophobically-coated region is configured to repulse the fluid from the article while the article is moving through the fluid. The process includes using the article by moving the article through the fluid wherein the hydrophobically-coated region repulses the fluid from the article.

A projectile for ammunition, such as a bullet for ammunition, may have a caliber of at most 13 mm. The projectile may include a bullet core made of iron and a surface coating. The surface coating may from an outer skin of the bullet at least sectionally and/or having a thickness of more than 1 ?m and less than 50 ?m.

A method is disclosed for coating a projectile for use in an ammunition cartridge. A polymer jacket is applied to an undersized projectile core of a first standard caliber to bring the outer dimensions of the jacketed projectile into compliance with those of a second, larger caliber projectile. The polymer jacket coating may produce a non-uniform outer diameter of the polymer jacketed projectile and may include a plurality of circular cavities defined therein. The polymer-jacketed projectile may be a bullet for pistol or rifle ammunition, or a pellet, or shot for use in a shotgun shell.

A method is disclosed for coating a projectile for use in an ammunition cartridge. A polymer jacket is applied to an undersized projectile core of a first standard caliber to bring the outer dimensions of the jacketed projectile into compliance with those of a second, larger caliber projectile. The polymer jacket coating may produce a non-uniform outer diameter of the polymer jacketed projectile and may include a plurality of circular cavities defined therein. The polymer-jacketed projectile may be a bullet for pistol or rifle ammunition, or a pellet, or shot for use in a shotgun shell.

An EOD disruptor system for penetrating steel encased explosive devices has a barrel and a blank cartridge loaded in the EOD disruptor. A water column is disposed in the barrel in front of the blank cartridge. A water plug is disposed in front of the water column. A muzzle-loaded projectile is disposed in front of the water plug. The projectile includes a shaft portion at least partially disposed in the barrel and a front portion disposed outside of the barrel. The shaft portion may have a length from about four inches to about eighteen inches. The projectile may have a weight from about four ounces to about two pounds. The ratio of the length of the shaft portion of the projectile to the inner barrel diameter may be in a range of about two to about 50.

A nonlethal bullet includes a casing having an open front end with a frangible rubber bullet head seated therein. The bullet head includes a tip with an opening thereon that is in communication with an interior chemical chamber. A plug adhesively secured within the opening is driven into the chemical chamber upon impact with a target. Accordingly, when the bullet is fired by a weapon and strikes an intruder or assailant, the plug is driven into the chemical chamber, causing the tip to splinter, releasing the incapacitating agent.

A nonlethal bullet includes a casing having an open front end with a frangible rubber bullet head seated therein. The bullet head includes a tip with an opening thereon that is in communication with an interior chemical chamber. A plug adhesively secured within the opening is driven into the chemical chamber upon impact with a target. Accordingly, when the bullet is fired by a weapon and strikes an intruder or assailant, the plug is driven into the chemical chamber, causing the tip to splinter, releasing the incapacitating agent.

A friction preventing apparatus and a method of manufacturing the same are provided. The apparatus includes: a first object; a second object spaced apart from the first object and facing the first object; and a plurality of charged nanoparticles provided on a surface of one of the first and second objects, such that the nanoparticles are disposed between the first object and the second object. A potential difference is formed between the first and second objects. The nanoparticles may be positively charged and may adhere to the first object, and the first object has a potential lower than a potential of the second object. The nanoparticles may be negatively charged and may adhere to the second object, and the second object has a potential higher than a potential of the first object.