👉 An adjustment weapon, also known as a modem or aftermarket attachment, is an electronic device designed to modify the performance of firearms by altering their internal or external components. These weapons typically interface with the firearm's existing hardware, such as the barrel, stock, or trigger group, to enhance accuracy, increase rate of fire, extend magazine capacity, or improve overall functionality. Adjustment weapons are popular among gun enthusiasts and professionals alike for their ability to tailor firearms to specific needs without requiring extensive modifications or factory changes. They can range from simple modifications like barrel adjusters to complex systems involving electronic controls and custom parts, offering a versatile way to optimize firearm performance.