Tactical training round

For other types of non-lethal ammunition, see stun round. A tactical training round (TTR), occasionally referred to as a stun round, is a type of training ammunition used to simulate live fire.

Description
The TTR has a plastic polymer shell that helps maintain the actual characteristics of bullet flight. Inside, there is a proximity fuse that dissolves the shell when the round comes within 10 centimeters of a surface. Once dissolved, a blob of red paint splatters onto the target. The paint also hides a powerful anesthetic, capable of knocking a target unconscious for hours depending on the area hit, and immobilizes the nano-fibers woven into training clothing, causing it to harden. The target then loses the ability to move the body part that is hit, simulating a bullet wound to that area.

The rounds are known to be used in MA5B and MA5D Assault Rifles, M6 Magnum Sidearms, SRS99C-S2 AM Sniper Rifles, as well as XBR55 battle rifles. There are also TTR grenades and claymores.

A less advanced version of a tactical training round is used in the paint pellet gun.

Trivia
Lieutenant Commander Jilan al-Cygni used two TTR shots to knock Governor Nils Thune unconscious and end his resistance to the evacuation plan for Harvest during the First Battle of Harvest.

List of appearances

 * Halo: Contact Harvest
 * Halo: Evolutions - Essential Tales of the Halo Universe
 * Dirt
 * Halo 4: Forward Unto Dawn
 * Halo: Initiation