Abstract: A rifle or portable firearm assembly (e.g., 310) configured to work with user-actuable sensors and systems (e.g., S1-S4), comprises a removable receiver assembly 312 attached to and responsive to a trigger assembly 50 which are removably received in a stock or chassis 316 having a middle section 324 with a trigger motion sensing sidewall segment with at least one trigger motion sensor (e.g., 340L, 340R) which does not physically contact or attach to the trigger assembly and is instead spaced from every component of the trigger assembly when the receiver is installed in said stock or chassis. The trigger motion sensor is configured to sense, from a selected standoff distance, without contacting or interfering the trigger assembly in any way, at least one of (a) the trigger's first stage movement or (b) actuation of a safety lever, and generate a “trigger motion sensed” signal in response thereto.

Abstract: A load measurement sub for measuring a load transferred between the sub and an inner surface of a tubing string includes a housing. The housing includes a central axis, an internal cavity, and a radially outermost surface. In addition, the load measurement sub includes a first load measurement assembly at least partially disposed within a first port extending from the radially outermost surface to the internal cavity. The first load measurement assembly includes a first button extending radially from the first port and the radially outermost surface of the housing. The first load measurement assembly also includes a first load cell. Further, the load measurement sub includes a first biasing member disposed between the first button and the first load cell. The first biasing member is configured to bias the first button away from the first load cell.

Abstract: A rifle or portable firearm assembly (e.g., 310) configured to work with user-actuable sensors and systems (e.g., S1-S4), comprises a removable receiver assembly 312 attached to and responsive to a trigger assembly 50 which are removably received in a stock or chassis 316 having a middle section 324 with a trigger motion sensing sidewall segment with at least one trigger motion sensor (e.g., 340L, 340R) which does not physically contact or attach to the trigger assembly and is instead spaced from every component of the trigger assembly when the receiver is installed in said stock or chassis. The trigger motion sensor is configured to sense, from a selected standoff distance, without contacting or interfering the trigger assembly in any way, at least one of (a) the trigger's first stage movement or (b) actuation of a safety lever, and generate a “trigger motion sensed” signal in response thereto.

Abstract: A load measurement sub for measuring a load transferred between the sub and an inner surface of a tubing string includes a housing. The housing includes a central axis, an internal cavity, and a radially outermost surface. In addition, the load measurement sub includes a first load measurement assembly at least partially disposed within a first port extending from the radially outermost surface to the internal cavity. The first load measurement assembly includes a first button extending radially from the first port and the radially outermost surface of the housing. The first load measurement assembly also includes a first load cell. Further, the load measurement sub includes a first biasing member disposed between the first button and the first load cell. The first biasing member is configured to bias the first button away from the first load cell.

Abstract: A duplex projectile cartridge system (e.g., 400) for use in a standard rifle (e.g., 10) has a front bullet (e.g., 320) and a substantially cylindrical back bullet (e.g., 440) coaxially aligned with one another. The front bullet's base is held in the cartridge case neck far enough to engage the back bullet's front surface so that the case neck simultaneously bears upon the front bullet and the back bullet. Optionally, the cartridge configuration orients the back bullet and defines one or more gas bypass lumens to allow expanding gas to initially bypass the back bullet and drive the front bullet distally to force an inter-bullet gap (e.g., “IBG” 480) upon firing.

Abstract: A security door breach training system comprising a frame member; a plurality of elongate members, each of the elongate members fixed to the frame member and having a free end spaced from the frame member, the plurality of elongate members including at least one capture member, a first clevis member, and a second clevis member fixed to the frame member opposite the first clevis member; at least one retention bar attached between two of the elongate members and spaced a distance from the frame member; and at least one retaining pin adjacent to the frame member, the at least one retaining pin comprising an elongate element at least partially adjacent to the frame member and having a first end and an opposing second end, a retaining pin socket attached to the elongate element proximal to the first end, and a stub extending from the at least one elongate element proximal to the second end.

Abstract: A security door breach training system comprising a frame, a door attached to the frame, a latch attached to the door having a latching end, a plurality of elongate members fixed to the frame, at least one retaining pin adjacent to the frame and having a stub, a latch-receiving member positioned between the frame member and the stub of the at least one retaining pin, an elongate body having a first end attached to the third surface of the frame member and a free second end; and at least one bar attached between two of the elongate members.

Abstract: A drop-in adjustable trigger assembly has a camming safety linkage to selectively move and engage a bolt sear to positively prevent movement of the bolt sear. The drop-in trigger assembly housing carries a pivoting bolt sear engagement member which is connected to a sear safety linkage. The housing has a sear safety linkage slot defined therein which guides the pivoting sear safety linkage in response to actuation of an upwardly projecting thumb safety lever's actuation. A trigger bracket preferably carries a removable, reversible trigger shoe and is configured to pivot within the housing about a pivot point within the housing, and the trigger bracket carries an adjustable rocker having (preferably) a first stage movement adjustment and a second stage length adjustment. The pivoting safety mechanism's safety linkage pivots rearwardly to push upon or cam the bolt sear upwardly, thus disengaging the bolt sear from the trigger sear.

Abstract: A drop-in adjustable trigger assembly has a camming safety linkage to selectively move and engage a bolt sear to positively prevent movement of the bolt sear. The drop-in trigger assembly housing carries a pivoting bolt sear engagement member which is connected to a sear safety linkage. The housing has a sear safety linkage slot defined therein which guides the pivoting sear safety linkage in response to actuation of an upwardly projecting thumb safety lever's actuation. A trigger bracket preferably carries a removable, reversible trigger shoe and is configured to pivot within the housing about a pivot point within the housing, and the trigger bracket carries an adjustable rocker having (preferably) a first stage movement adjustment and a second stage length adjustment. The pivoting safety mechanism's safety linkage pivots rearwardly to push upon or cam the bolt sear upwardly, thus disengaging the bolt sear from the trigger sear.

Abstract: A security door breach training system comprising a frame, a door attached to the frame, a latch attached to the door having a latching end, a plurality of elongate members fixed to the frame, at least one retaining pin adjacent to the frame and having a stub, a latch-receiving member positioned between the frame member and the stub of the at least one retaining pin, a elongate body having a first end attached to the third surface of the frame member and a free second end; and at least one bar attached between two of the elongate members.

Abstract: A security door breach training system comprising a frame, a door attached to the frame, a latch attached to the door having a latching end, a plurality of first elongate members fixed to the frame, at least one retaining pin adjacent to the frame, a latch-receiving member positioned between the frame member and the stub of the at least one retaining pin, a second elongate member having a first end attached to the third surface of the frame member and a free second end, the second elongate member in contacted with the latch-receiving member; and at least one bar attached between two of the first elongate members.