A stun grenade (100, 156), comprising: a housing comprising a longitudinal axis, a delay chamber defined in the housing proximate the longitudinal axis, a series of payload chambers defined in the housing and surrounding the delay chamber, each payload chamber of the series of payload chambers comprising openings at opposing ends (110, 112) of the housing and in communication with the delay chamber via a port extending between each payload chamber of the series of payload chambers and the delay chamber, each port being longitudinally and circumferentially offset from each other longitudinally adjacent port; a delay material located in the delay chamber; a payload material located in each payload chamber of the series of payload chambers and each port; seals sealing the openings of each payload chamber of the series of payload chambers at the opposing ends (110, 112) of the housing; and a fuze secured to the housing in communication with the delay chamber, the fuze being configured to ignite the delay material; the stun grenade (100, 156) characterized in that, when secured to the housing, the fuze is oriented to position a handle of the fuze over a final payload chamber of the series of payload chambers and the port extending between the delay chamber and the final payload chamber is located to cause payload material in the final payload chamber to ignite after ignition of payload material in each other payload chamber of the series of payload chambers to reduce the likelihood that expelled hot gases from ignition of the final payload chamber will reflect off the handle and prematurely, sympathetically ignite adjacent payload chambers. a housing comprising a longitudinal axis, a delay chamber defined in the housing proximate the longitudinal axis, a series of payload chambers defined in the housing and surrounding the delay chamber, each payload chamber of the series of payload chambers comprising openings at opposing ends (110, 112) of the housing and in communication with the delay chamber via a port extending between each payload chamber of the series of payload chambers and the delay chamber, each port being longitudinally and circumferentially offset from each other longitudinally adjacent port; a delay material located in the delay chamber; a payload material located in each payload chamber of the series of payload chambers and each port; seals sealing the openings of each payload chamber of the series of payload chambers at the opposing ends (110, 112) of the housing; and a fuze secured to the housing in communication with the delay chamber, the fuze being configured to ignite the delay material; the stun grenade (100, 156) characterized in that, when secured to the housing, the fuze is oriented to position a handle of the fuze over a final payload chamber of the series of payload chambers and the port extending between the delay chamber and the final payload chamber is located to cause payload material in the final payload chamber to ignite after ignition of payload material in each other payload chamber of the series of payload chambers to reduce the likelihood that expelled hot gases from ignition of the final payload chamber will reflect off the handle and prematurely, sympathetically ignite adjacent payload chambers.