Abstract: An explosive barrier wire for rapid emplacement with bare hands. The wire is assembled in a configuration wherein barbs or other hazardous elements are ineffective. After installation in an obstacle the barbs can be quickly deformed into a hazardous configuraton by explosive means.

Abstract: A method of forming barrier wire by explosive means. A strip of deformable material provided with grooves or slits intersecting its edges is wrapped helically around a strand of wire or explosive cord. An explosion is caused within the helix, thus deforming pointed portions of the strip generally out from the helix.

Abstract: A guide to facilitate quick insertion of a magazine into a firearm which houses the magazine in a handle. The guide can be fabricated separately or it can be incorporated into the grips used on the handle. Luminescent indicators can be provided on the guide and on the magazine to help speed insertion when visibility is restricted.

Abstract: A spring for long-term installation in a limited space, in a minimum-stress condition. When thrust is desired, the position of some spring components is adjusted, resulting in a tendency for the spring to expand.

Abstract: An adjustable spring assembly which can be installed in a no-load condition in a minimum space. When the spring is to exert thrust, some parts are moved relative to others so as to cause mutual interference tending to expand the assembly. One suggested use for this type of spring assembly is in cartridge magazines for firearms.

Abstract: Ballistic cutting devices for use in front of the muzzle of a firearm. One type has a hook to engage material to be cut. Another type utilizes two bayonets to windlass the material to be cut. Bipod legs are also disclosed as windlassing elements. Magnetic means for engaging obstacle material are disclosed. Each type of cutter includes means to align material to be cut with the path of a bullet discharged from a firearm.

Abstract: A ballistic cutter is mounted at the muzzle of a firearm to permit severing a strand of obstacle material by discharging a bullet. The sound of the discharge is muffled by a sound suppressor at the muzzle, or by using a silent cartridge in the firearm.

Abstract: A process for making barbed material without scrap loss. The first step in manufacture is slitting the edge of the material to form points. The points are then bent to an exposed position by tractive magnetic means. As an additional step the pointed portions can be further displaced away from the edge by elongating or twisting the material.

Abstract: A device for rapidly emptying a cartridge magazine of the type which feeds alternately from a right and a left feed lip. The top-most cartridge in the magazine is disengaged from the feed lip by slightly depressing the other cartridges in the magazine. The top cartridge can then fall out. The process is repeated as each cartridge reaches the top. The last cartridge is disengaged by slightly depressing the follower.