Abstract: A firearm system can include a modular mono-block shotgun system and a standardizing sighting system. The modular mono-block shotgun system can have multiple interchangeable barrels of different gauges for assembling a single shotgun. Each barrel can include an inherent low-rail sight longitudinally along its top surface. The standardizing sighting system can be installed upon the low-rail sight of each barrel of the modular mono-block system. The height of each barrel with its corresponding component of the standardizing sighting system can be substantially equal to the height of a largest gauge barrel with its corresponding component. After changing barrels, a need to make adjustments to the shotgun to account for changes in sighting and impact spread can be eliminated.

Abstract: The grinding wheel and roll are particularly positioned to each other on the basis of parameters representing the local slope changes of the roll groove and its deviation from a semi-toroidal groove. The grinding wheel can be moved in two orthogonal directions, one being transversely to its normal orientation, but needs tilting therefrom while the roll is moved transversely to both directions. Digital control moves the parts into the desired positions.

Abstract: Electric generators having a rotor on a shaft and a stator, both carrying peripherally successive poles that have a substantially uniform angular distance or pole step therebetween, with at least one pair of electrically identical but separate, axially aligned generator sections that include pole cores that occupy substantially the same sectors as the gaps between them, and wherein the angular position of the rotor shaft, in which the poles overlap between the rotor and the stator of the same generator section, is offset for both sections by half the angular distance between the poles. Preferably at least one group of radially mounted, and at least one group of axially mounted, pole pairs os provided in both the rotor and the stator. Preferred exemplary embodiments are disclosed.