The BLUF: The 21-foot rule comes from a 1983 study by Sergeant Dennis Tueller of the … What Is the 21-Foot Rule? The Tueller Drill, Reaction Time, and the Tactical Tips That Actually WorkRead more
21 Foot Rule
The BLUF: The 21-foot rule comes from a 1983 study by Sergeant Dennis Tueller of the … What Is the 21-Foot Rule? The Tueller Drill, Reaction Time, and the Tactical Tips That Actually WorkRead more