All times are in seconds. Consider every one +/- 0.05 seconds. I recorded myself running between two ground markings and did the timing in a video editor.
Any area where you're able to fully sprint (outdoor areas, some indoor areas)- Fists: 3.25 Pistols: 3.25 Shotguns: 3.63 SMGs: 3.25 Rifles: 3.70 RPG: 3.25 Thrown: 3.25
Any area which restricts you to a slow run (most indoor areas)- Fists- Run (no aiming): 3.85 Jumping: 4.07
Pistols- Run (no aiming): 3.90 Run+Aim (from a standstill -> aim -> hold shift -> begin moving): 5.52 Run+Aim (from a run -> aim -> continue moving): 4.57 Jumping: 4.07
Shotguns- Run (no aiming): 4.85 Run+Aim (from a standstill -> aim -> hold shift -> begin moving): 5.50 Run+Aim (from a run -> aim -> continue moving): 5.50 Jumping: 3.93
SMGs- Run (no aiming): 3.88 Run+Aim (from a standstill -> aim -> hold shift -> begin moving): 5.53 Run+Aim (from a run -> aim -> continue moving): 4.55 Jumping: 4.10
Rifles- Run (no aiming): 4.80 Run+Aim (from a standstill -> aim -> hold shift -> begin moving): 5.50 Run+Aim (from a run -> aim -> continue moving): 5.50 Jumping: 3.98
RPG- Run (no aiming): 3.90 Run+Aim (from a standstill -> aim -> hold shift -> begin moving): 3.85 Run+Aim (from a run -> aim -> continue moving): 3.90 Jumping: 3.85
Thrown- Run (no aiming): 3.87 Jumping: 4.07
Stairs (going up)- RPG (not aiming): 1.50 RPG (jumping): 1.50 RPG (aiming): 1.42 SMG (not aiming): 2.25 SMG (jumping): 1.45 SMG (aiming): 2.00
Stairs (going down)- RPG (not aiming): 1.38 RPG (jumping): 1.42 RPG (aiming): 1.55 SMG (not aiming): 2.12 SMG (jumping): 1.58 SMG (aiming): 2.78
I remember many years ago viewing the beginning of a highlighted run which started just as the previous attempt was coming to a semi-disastrous close. Sometimes a VOD like this was accompanied by a remark signaling frustration or lost hope which, I suppose, the runner felt was a bit of amusing juxta