K-51 gas grenade

Also known as

K-51
K51

K-51 gas grenade is a Soviet-era Russian CS gas grenade described in open-source references as a base-emission, anti-riot hand grenade with a K-510 fuze and CS irritant filling. Wartime reporting in Ukraine shows a DJI Mavic-series drone carrying one for a planned drop.

K-51 gas grenade, CS gas grenade, Munitions

Image source: File:K-51 grenade dropped by Russian drone in Donetsk Oblast.jpg

Profile / Specs

Profile

Origin: Soviet Union
Built by: Russian enterprises
Built in: RussiaSoviet Union
Type: CS gas grenade
Service note: Soviet-era riot-control grenade still documented in modern Russian use

ammunition grenade

Specifications

Body diameter: 58 mm
Overall height: 145 mm
Empty weight: 136 g
Fuze: K-510 fly-off lever igniter
Filling: CS irritant
Function: Base-emission hand grenade

Carrier UAV

Open-source reporting links the grenade to a DJI Mavic-series drone prepared for a planned drop.

Carrier

Carrier type

Carriage evidence

DJI Mavic series, Commercial quadcopter UAV, Aircraft & UAVs

DJI Mavic series

Commercial quadcopter UAV

Gagadget reports that a DJI Mavic-series drone, judged from photos to be a Mavic 3, was carrying a K-51 gas grenade for a planned drop.

Sources: Ukrainian border guards seize Russian DJI Mavic 3 quadcopter with K-51 gas grenade for the first time

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Sources

K-51 grenade - METISPublisher: Fenix Insight | Note: Supports K-51 base-emission hand-grenade background, Soviet-era development context, CS filling, K-510 fuze, and Russian Federation / USSR manufacture context. | Accessed: 2026-06-27 K 51 hand grenade - CAT-UXOPublisher: CAT-UXO | Note: Supports the K-51 as a Russian CS gas, riot-control hand grenade and provides general technical context for the type. | Accessed: 2026-06-27 Ukraine - Statement by the Delegation of Ukraine to the OPCW at the 105th Session of the Executive Council under Agenda Item 7(e)Publisher: OPCW | Note: Supports K-51 production context tied to Russian enterprises and wartime reporting about Russian military formations. | Accessed: 2026-06-27 File:K-51 grenade dropped by Russian drone in Donetsk Oblast.jpgPublisher: Wikimedia Commons | Note: Image provenance and licensing page for the K-51 grenade photo. | Accessed: 2026-06-27 Ukrainian border guards seize Russian DJI Mavic 3 quadcopter with K-51 gas grenade for the first timePublisher: Gagadget | Note: Supports the K-51 being carried by a DJI Mavic-series drone in Ukraine for a planned drop. | Accessed: 2026-06-27