It stands for Weapon Squad Leader (WSL) pronouned as weasel.
WSL is the squad leader of the gun team within weapon squad so usually weapon squad consiste of its squad leader (WSL) and his gun team. They usually provide fire support to A and B team of another infantry squad.
Weapon Squad usually consist of:
- Squad Leader (1)
- Machine Gun Team (2 soldiers): Soldier with M240 machine gun or M249 Squad Automatic Weapon (SAW) called gunner and assistant gunner call AG ( AG is the most senior in the gun team) (plus additinally soldier acted as Ammunition Bearers who helped carry the extra ammunition or help with carrying M240’s tripod)
- Anti-Tank or Anti-Materiel Weapon Team (2 soldiers)
- Grenadier (1 soldier): carry M4 with M320 Grenade Launcher Module
- Riflemen (2-3 soldiers)
WSL is usually advised the Patrol Leader or Platoon Leader in a platoon-size element (PL). PL is usually a Second Lieutenant or Lieutenant (a lieutenan, junior commissioned officer rank)
Platoon Leader’s Typical Chain of Command:
- Platoon Leader (Officer – usually 2nd Lieutenant – O1 or 1st Lieutenant – O2)
- Platoon Sergeant (Enlisted Non-Commissioned Officer – NCO, often a Sergeant First Class, SFC – E7)
- Squad Leaders (Typically Sergeants or Staff Sergeants, SSG – E6)
- Team Leaders (Typically Seargeants, SGT – E5)
- Soldiers (Ranging from Privates to Specialists, SPC)
- Team Leaders (Typically Seargeants, SGT – E5)
- Squad Leaders (Typically Sergeants or Staff Sergeants, SSG – E6)
- Platoon Sergeant (Enlisted Non-Commissioned Officer – NCO, often a Sergeant First Class, SFC – E7)