The Tac Arm Sleeve Dope Card Holder provides tactical operators with a reliable, mission-critical solution for carrying ballistic data, range cards, and field reference materials. Featuring three transparent windows designed to securely hold standard 3"x5" cards, this sleeve enables quick access to essential firing data without compromising operational awareness. The adjustable arm-mounted design accommodates varying conditions—from bare skin deployment to heavy layered clothing—while maintaining a low profile. Dual-mounting capability allows deployment on the forearm or attachment to a rifle butt stock, providing operational flexibility across different tactical scenarios. Constructed from low-IR laminate fabric paired with durable 500D Nylon, the sleeve minimizes thermal signature while offering robust protection against field wear and environmental exposure. The side-loading configuration facilitates rapid card insertion and extraction, critical for time-sensitive operations. A dedicated hook-and-loop secured flap maintains document integrity and reduces IR reflection. The front loop attachment area accommodates unit identifiers, morale patches, or additional tactical accessories. This purpose-built platform streamlines data management in the field, allowing operators to maintain accuracy and efficiency during precision shooting, training exercises, as well as a simple spank bank or tactical operations.