CQB red dot sights including the Vortex Strikefire and Aimpoint PRO are typically 1x, i.e. not magnified. As someone else points out, this SIG scope at 3x is not ideal for CQB use.
Magnification limits your FOV and ability to quickly get on target, which is what CQB sights are designed for. To get magnification with these sights for longer range shooting, you add a separate magnifier which sits in front of the sites on a mount that swings out of the way when you don’t need the magnification.