This slide
from a 2002 presentation by the US Army and private weapons developers depicts
a smoke variant of the rifle
grenade claimed for biological weapons. This version carries a 230 gram payload
and has a range of 157 meters.
(Source: Application of Propellant Dissemination Technology for Non-Lethal Aerosols, presentation by Daniel Hartman, et. al., NDIA/NTIC 2002 Mines, Demolition and Non-Lethal Conference & Exhibition, 4 June 2002. URL: http://www.dtic.mil/ndia/2002mines/hartman.pdf Warning: The source document is 42.3 megabytes. An index of presentations can be found at http://www.dtic.mil/ndia/2002mines/)