25mm Caseless Grenade
The 25 mm grenade is a type of explosive ordnance used in some modern grenade launchers.
Examples of weapons designed to launch 25 mm grenades are the experimental XM25, the Barrett XM109 payload rifle, and the XM307 ACSW. The original use for this round was for the OCSW, now known as the XM307 ACSW. Later, a low velocity variant of the OCSW round was chosen for the XM25, which is derived from the XM29 OICW.
25 mm grenades are armed after launch, after traveling a safe distance. Many types explode on impact, but others are designed to explode in mid-air after traveling a certain distance—used to clear entrenched or barricaded positions.
Caseless
Essentially, the grenades for the 25mm x 40mm and 25mm x 59mm grenades are the same, with the cartridge and powder levels being different.
The rounds are caseless, based off of the 3GL caseless firing mechanism, and designed for use both inside 3GL's, modified 3GL's, and various other 25mm grenade devices.
