Abstract: The present invention relates to increasing the flight stability of a bullet in subsonic flight. The bullet may incorporate features that impart additional angular momentum during flight. Helical fins may be configured such that laminar airflow over the bullet during flight increases rotational forces, thus increasing the angular momentum of the bullet and stabilizing it during flight. The fins may be self-forming during the use of the bullet or may be formed during manufacturing.

Abstract: The present invention relates to an active system configured to apply an active force to a portion of a firearm designed to contact a body of the firearm's operator, to reduce the perceived recoil of the firearm. The active system includes an actuation element capable of generating an active force, and systems for powering and selectively operating the actuation element.

Abstract: The present invention relates to increasing the flight stability of a bullet in subsonic flight. The bullet may incorporate features that impart additional angular momentum during flight. Helical fins may be configured such that laminar airflow over the bullet during flight increases rotational forces, thus increasing the angular momentum of the bullet and stabilizing it during flight. The fins may be self-forming during the use of the bullet or may be formed during manufacturing.

Abstract: The present invention relates to an active system configured to apply an active force to a portion of a firearm designed to contact a body of the firearm's operator, to reduce the perceived recoil of the firearm. The active system includes an actuation element capable of generating an active force, and systems for powering and selectively operating the actuation element.

Abstract: The present invention relates to an active system configured to apply an active force to a portion of a firearm designed to contact a body of the firearm's operator, to reduce the perceived recoil of the firearm. The active system includes an actuation element capable of generating an active force, and systems for powering and selectively operating the actuation element.

Abstract: The present invention relates to an active system configured to apply an active force to a portion of a firearm designed to contact a body of the firearm's operator, to reduce the perceived recoil of the firearm. The active system includes an actuation element capable of generating an active force, and systems for powering and selectively operating the actuation element.

Abstract: The present invention relates to increasing the flight stability of a bullet in subsonic flight. The bullet may incorporate features that impart additional angular momentum during flight. Helical fins may be configured such that laminar airflow over the bullet during flight causes the bullet to rotate, increasing the angular momentum of the bullet and stabilizing it during flight. The fins may be self-forming during the use of the bullet or may be formed during manufacturing.

Abstract: The invention here described of novel aerodynamics and construction has been shown to alleviate the problems inherent in subsonic ballistics, such as, but not limited to, tumbling in flight, loss of impact energy, as well as the changes in both accuracy and precision of the firearm shots fired at subsonic speeds. The subsonic bullet herein described has three main aerodynamic components that aid in subsonic flight: 1) a parabolic or hemispherical nose; 2) a cylindrical center length with parallel sides; 3) a cone-like parabolic tail with an optimized tail geometry to slowly converge the laminar flow around the bullet without introducing turbulence. These features serve to reduce air pressure and turbulent airflow around the bullet during flight.

Abstract: A bullet whose aerodynamics is suitable for stable subsonic flight, including a parabolic or hemispherical nose section, cylindrical midsection, and a parabolic into conical tail section. It is constructed of a copper shell filled, in the tail, with a material having a density less than or equal to 3.0 g/cm3, and in the nose with a material having a density greater than or equal to 11 g/cm3. The bullet further includes a length sufficient to fill an appropriate standard casing combined with the proper amount of smokeless powder for subsonic flight. These characteristics allow for the bullet's stable and accurate flight at speeds below 343.2 m/s.

Abstract: A device is described for obtaining compressed gas from a scuba tank for low pressure applications. One end of the device consists of a male standard BCD (Buoyancy Control Device) inflator stem (2), which may connect to the low pressure hose of a first-stage regulator (6). The other end of the device consists of a female air chuck quick couple fitting (1), which may connect to any commercial air chuck (4). This will allow gas from a scuba tank to be used in most low-pressure applications, including, but not limited to, filling tires, water pressure tanks, and/or air bladders, spray painting, pressure cleaning, and/or air pressure drying.