|- ! colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;" | .25 WSSM |- | colspan="3" style="text-align: center; font-size: 90%; border-bottom: 1px solid #aaa; line-height: 1.25em;" | Image:25 WSSM cartridge comparison AR-15.jpg25 WSSM cartridges loaded for an AR-15 magazine. For comparison, a 2 3/4" shotgun shell & 5.56mm NATO cartridge are included |- ! style="padding-right: 1em;" | Type | colspan="2" | Rifle |- ! style="padding-right: 1em;" | Place of origin | colspan="2" | USA |- |- |- |- | Production history |- | Specifications mm ) mm ) mm ) mm ) mm ) mm ) mm ) mm ) |- |- |-