as the structure is at least in size, which is about in volume, and has sufficient ventilation. The Department of the Army previously rated the weapon as safe to fire from enclosure, but this rating was removed in 2010 after the introduction of the safer AT4 CS. However, some modern variants of the LAW are specifically designed with fire-from-enclosure (FFE) capability. In late 2021, Nammo unveiled the concept of a multi-rotor unmanned aerial vehicle (UAV) equipped with a LAW. The tube is mounted facing downward, enabling the drone operator to fire on tanks and armored vehicles from a top attack position while remaining away. Ammunition M72 LAWs were issued as prepackaged rounds of ammunition. Improvements to the launcher and differences in the ammunition were differentiated by a single designation. The original M72 warhead penetrated of armor. A training variant of the M72 LAW, designated M190, also exists. This weapon is reloadable and uses the M73 training rocket. A subcaliber training device that uses a special tracer cartridge also exists for the M72. A training variant used by the Finnish armed forces fires tracer rounds. The US Army tested other 66 mm rockets based on the M54 rocket motor used for the M72. The M74 TPA (thickened pyrophoric agent) had an incendiary warhead filled with TEA (triethylaluminum); this was used in the M202A1 FLASH (flame assault shoulder weapon) four-tube launcher. The XM96 RCR (riot control rocket) had a CS gas-filled warhead for crowd control and was also intended for use with the M202, though the rocket never entered service. Service history Australia The M72 rocket has been in Australian service since the Vietnam War. Currently, the Australian Defence Force uses the M72A6 variant, known as the "light direct fire support weapon", as an anti-structure and secondary anti-armor weapon. The weapon is used by ordinary troops at the section (squad) level and complements the heavier Carl Gustav recoilless rifle and Javelin missile, which are generally used by specialized fire support and anti-armor troops. Canada As of 21 February 2023, Canada has supplied 4500 M72s to Ukraine for use in the Russo-Ukrainian War. These are likely the M72A5-C1 designation. Finland The M72 LAW is used in the Finnish Army (some 70,000 pieces), where it is known under the designations 66 KES 75 (M72A2, no longer in service) and 66 KES 88 (M72A5). In accordance with the weapon's known limitations, a pair of "tank-buster"