A firearm accessory is operable in two modes. A first mode in which the firearm accessory is coupled, at least indirectly, to a firearm to define a foregrip. In the first mode, a blade on the accessory is in a sheathed position. A second mode in which the firearm is disconnected from the firearm to define a knife. In the second mode, the blade is in an extended position. In each mode and position, the tip of the blade is vertically above the upper end of the grip body. The firearm accessory has prongs that connect the grip body to an attachment mechanism or coupler. Within the coupler are flexible liner locks that have sloped protrusions that engage recess in the blade to lock the blade in the extend position. The liner locks may be flexibly unlocked by depressing a button carried by the grip body.

The disclosed self defense devices include devices configured to look like everyday clothing or accessories, but which allow a user to respond to potential danger or attack.

A knife with an extensible blade is formed by a handle that defines a cavity in which the blade is placed. The cavity is open at least on the side adjacent to the blade tip. In the cavity, at least one guiding groove is formed, which guiding groove is blind near the front edge of the handle. The blade is equipped with at least one guiding member corresponding with the guiding groove of the handle. The handle cavity is further equipped with a pull-out groove. A pulling element that selectively connects to the blade leads through and protrudes out of the pull-out groove when the blade is in a retracted position.

Ballistic shields having a convex configuration including a middle section and forward angled left side and right side wings. The shields may also include at least three manual or electro-mechanical roller units, transparent windows or display devices with cameras or other motions sensors, and spikes, electro-shock devices, or non-lethal incapacitating devices.

The knife with an extensible blade is formed by a handle equipped with a cavity in which the blade is placed. The cavity is open from its side adjacent to the blade tip. In the cavity, at least one guiding groove is formed which is blind near the front edge of the handle. Near its rear, blunt edge, the blade is equipped with at least one guiding member corresponding with at least one guiding groove of the handle. The cavity is farther equipped with an extending groove being open from its front side adjacent to the blade tip and cooperating with a connecting member of the blade. An extending member connectable with this connecting member leads through the extending groove of the handle and protrudes out of it when the blade is housed inside the handle.

A firearm accessory is operable in two modes. A first mode in which the firearm accessory is coupled, at least indirectly, to a firearm to define a foregrip. In the first mode, a blade on the accessory is in a sheathed position. A second mode in which the firearm is disconnected from the firearm to define a knife. In the second mode, the blade is in an extended position. In each mode and position, the tip of the blade is vertically above the upper end of the grip body. The firearm accessory has prongs that connect the grip body to an attachment mechanism or coupler. Within the coupler are flexible liner locks that have sloped protrusions that engage recess in the blade to lock the blade in the extend position. The liner locks may be flexibly unlocked by depressing a button carried by the grip body.

A case for a communication device such as a cell phone, said case including a tool such as a weapon.

A case for a communication device such as a cell phone, said case including a tool such as a weapon.

The knife includes a handle portion attached to a blade with a tip at its distal end. The blade comprises four surfaces that converge to form a spine and opposing cutting edges with each surface having a concave segment, a first angled segment, a flat segment, and a second angled segment as the surface extends from the spine to the edge. Similarly, the tip includes four surfaces that converge and terminate at a point, with each surface comprising only an angled segment. Optionally, the knife includes a unique safety lanyard that has two attachment points on the handle such that a closed loop is adjustably formed around the user's hand when gripping the handle, which aids in withdrawing the knife, stabilizing the user's grip, and preventing the hand from sliding forward while in use. Optionally, the knife includes a thumb plate as an additional safeguard.

A self-defense pocket knife with handle of suitable proportion to be grasped in closed fist and a conveyance system configured for the emergency manual conveyance of a blade from a position for storage to a position for use without requiring the user to appreciably alter or compromise grip upon the handle during the course of such conveyance.