Book excerpt: Army Techniques Publication ATP 3-21.91 (FM 3-21.91, ) Stryker Brigade Combat Team Weapons Troop May 2017 Army technique publication (ATP) 3-21.91 describes how the Stryker brigade combat team (SBCT) weapons troop and its platoons fight. This publication provides doctrine for employing the SBCT weapons troop and its platoons. It contains guidance on techniques weapons troops and its platoons use in offensive, defensive, and stability tasks. The target audience includes leaders in the SBCT weapons troop, SBCT battalion and brigade level commanders, and staff officers. This publication reflects and supports the Army doctrine found in Field Manual (FM) 3-96 and serves as an authoritative reference for personnel who- Develop doctrine (fundamental principles and tactics, techniques, and procedures [TTP] materiel, and force structure). Develop institution and unit training. Develop unit tactical standard operating procedures for SBCT antiarmor operations. This ATP replaces FM 3-21.91. FM 3-21.91 discussed three organizations: weapons companies in airborne and air assault battalions, antiarmor companies in SBCTs, and antitank guided missile (ATGM) platoons in light Infantry battalions. This ATP only discusses the weapons troops in SBCTs. All reference to antiarmor use of M2 machine guns and M19 grenade launchers were removed as they are not organic weapons of an SBCT weapons troop. This ATP updates company organization and equipment, Stryker unit symbols, and information on current and future weapon systems. This ATP includes updates to support Doctrine 2015