Why was the 21-foot rule changed?

• A. It was changed due to the distance not being attributed to any specific situation, this then lead to the distance of threats being called the reactionary gap
• B. It was changed due to the distance not being attributed to any specific situation, this then lead to the distance of threats being called the reactionary gap
• C. It was changed due to new firearm technology
• D. It was changed to shorten arrest distances

Answer: (B)

Distance is treated as a situational, dynamic measure rather than a fixed number. The change moves away from using a single 21-foot threshold to a concept called the reactionary gap, which is the space needed for an officer to perceive, decide, and physically respond to a threat.

Why this change makes sense is that real-world encounters vary widely. The time and space required to safely respond depend on factors like the type of threat, how quickly the subject closes distance, the officer’s training and readiness, visibility, obstacles, and the environment. A universal distance can be too large in some scenarios and too small in others, so framing safety margins around the reactionary gap allows the response to be scaled to the specifics of each situation.

The shift isn’t about new firearm tech or simply shortening arrest distances; it’s about recognizing that appropriate distance should reflect the actual conditions of each encounter and the time needed to react.