“The LSAT actually comes in two versions. One uses ammo using a non-metal, telescoped case, and the other uses caseless ammo. The telescoped ammo is ready for use now while the caseless stuff is still in development.”
More info, including some not very detailed photos of ammo here:
militarytimes.com/blogs/gearscou … pound-lmg/
More details on the ammo, please?