Abstract: A first-in-first-out (FIFO) device includes a plurality of FIFO stages coupled in series. Each FIFO stage includes a data register representing a FIFO entry, a valid register storing a data valid signal to provide a valid signal to indicate whether the FIFO entry is storing valid data, and an input multiplexer to provide data to a FIFO stage. Upon receiving a push signal to store input data into the FIFO device, a FIFO stage of the FIFO device determines whether to update the data register of the FIFO stage based on respective valid signals from the FIFO stage, and neighboring FIFO stages of the FIFO stage. Upon receiving a pop signal to provide output data from the FIFO device, the FIFO stage determines whether to provide data stored in the data register of the FIFO stage or the input data of the FIFO device to the preceding FIFO stage.

Abstract: A firearm stabilizing device includes a base that is attached or attachable to a garment. The base includes an array of one or more magnets, at least one of the magnets of the array being an attractive magnet configured to cause a firearm magnet that is incorporated into a stock of the firearm to adhere to the base when brought into magnetic range of the attractive magnet. A tether connection structure is configured to enable mechanical suspension of the firearm from the base when the attractive magnet does not cause the firearm magnet to adhere to the base.

Abstract: A tactical vest system may include: a tactical vest; a power unit connected or connectable to the vest comprising a power supply; a sling connected or connectable to the vest for connecting to a rifle and suspending the rifle from a shoulder a user wearing the vest; and an electrical wire connected or connectable at one end of the wire to the power unit and connected or connectable at another end of the wire to electronic device mounted on the rifle, to provide power to the electronic device.