[Buck-40 operator-defeats-FPV concept art — Image to be uploaded]

Close-In Counter-Drone Defense for the Dismounted Operator

Buck-40 is a single-shot, purely kinetic counter-UAS cartridge for the M320 and M203 grenade launchers already under the rifle — a dense tungsten pattern that defeats a committed FPV drone in the final 15–20 meters, immune to jamming and spoofing.

What It Is

The FPV kamikaze drone is the defining close-combat threat of modern war, and nothing in the counter-UAS stack closes the last 15–20 meters for a soldier on foot. Crew-served hard-kill systems stay with the vehicle, jammers fail against fiber-optic and autonomous-terminal drones, and rifle fire needs aim and time the operator doesn’t have. Buck-40 fills that seam. It replaces a 40 mm grenade’s payload with a stack of tungsten pellets that open into a wide, forgiving pattern — filling the drone where precise aim is impossible. Because it’s purely kinetic, it works the same under full electronic attack, and it adds no weight, power, or new weapon to the squad.

Key Capabilities

• • Fires from the M320 / M203 already under the service rifle — zero added weight or power
• • Purely kinetic — immune to jamming, spoofing, and GPS denial
• • Defeats RF, fiber-optic, and autonomous-terminal FPVs alike, where soft-kill can’t
• • Wide, forgiving pattern for a target a stressed operator can’t precisely aim at
• • Closes the 15–20 m seam that crew-served systems can’t follow the dismounted force into

At a Glance

40 × 46 mm low-velocity cartridge · tungsten pellet payload · fires from M320 / M203 · purely kinetic, EW-immune