Abstract: The digital elevation knob is a digital replacement for a conventional elevation knob of a telescopic rifle sight. The knob is mounted to the rifle scope by a cylindrical body having a pair of flanges. The flanges are adapted for securing a microcomputer to the knob. A display screen is disposed on the front surface of the microcomputer. Inputs supply data to the microcomputer that processes the data. When the elevation knob is turned it turns a screw that is secured to a targeting element. The screw causes the targeting element to move vertically. A displacement sensor determines how much the targeting element has moved and sends a signal to the microcomputer. The input data and the information from the sensor are processed using trajectory programs and ballistic tables. The results of the data processing are projected on the display screen. The display informs the rifleperson of necessary adjustments.

Abstract: The digital elevation knob is a digital replacement for a conventional elevation knob of a telescopic rifle sight. The knob is mounted to the rifle scope by a cylindrical body having a pair of flanges. The flanges are adapted for securing a microcomputer to the knob. A display screen is disposed on the front surface of the microcomputer. Inputs supply data to the microcomputer that processes the data. When the elevation knob is turned it turns a screw that is secured to a targeting element. The screw causes the targeting element to move vertically. A displacement sensor determines how much the targeting element has moved and sends a signal to the microcomputer. The input data and the information from the sensor are processed using trajectory programs and ballistic tables. The results of the data processing are projected on the display screen. The display informs the rifleperson of necessary adjustments.

Abstract: A shoulder-fired semi-automatic rifle including an elongated housing, a barrel projecting forward from the housing, a bolt mechanism within the housing including a firing pin having a sear mechanism and a magazine depending from the housing and cooperating with the bolt mechanism. A shoulder seat depends from the housing immediately behind the magazine and is spaced substantially forward of the rear end of the housing. The trigger and trigger hand grip are mounted forward of the magazine. The trigger, spaced substantially in front of the sear mechanism, is connected to the sear mechanism through an elongated link member. A front hand grip also depends from the front portion of the housing in front of the trigger. The housing may also be provided with an upward projecting carrying handle located above the center of gravity of the rifle, when extending longitudinally horizontal.

Abstract: A trigger mechanism for a semi-automatic rifle in which a latch-disconnector hook member is mounted on the trigger member for engaging a catch on the transfer bar to temporarily hold the transfer bar down while the trigger is pulled and after the transfer bar has been depressed and thrust rearward by the rearward movement of the cocking lever to ensure the cocking of the firing pin as the bolt carrier moves over the transfer bar.

Abstract: A semi-automatic rifle including a recoiling barrel adapted to carry rearward the elongated bolt carrier containing the bolt for compressing the recoil spring, and a self-unlocking device including a self-unlocking rod longitudinally slidably mounted on the bolt carrier normally engaging the rear face of the barrel in a battery position and a trigger actuating device for thrusting the self-unlocking rod forward during the early stage of recoil for separation of the bolt carrier from the barrel before the barrel reaches the end of its recoil movement.

Abstract: A light-weight, shoulder-firable, armor-penetrating gun characterized by a recoiling barrel confined to coaxial movement by a pair of longitudinally spaced bushings within the gun housing, the recoiling barrel being adapted to carry rearward the elongated bolt carrier containing the bolt for compressing the recoil spring, and a stop mechanism associated with the barrel and the housing for limiting the rearward travel of the barrel for early disengagement between the barrel and the bolt carrier, and a barrel spring in the front of the housing for returning the barrel to its normal battery position.