Two things that would make clearing corners much safer and easier: A telescopic mirror (or other handheld mirror) and a Cornershot. The mirror will allow you to peek around a corner without exposing yourself (to check for turrets around a corner, for example) and a Cornershot will allow you to fire around a corner without exposing yourself.
The Cornershot is a framework that accepts nearly any pistol and can pivot the gun around a corner. A camera lets the operator see without exposing themselves. It’s a real gun used by SWAT and special forces units. It also has an attachment for a 40mm launcher and an “Assault Pistol Rifle” that fires standard 5.56 ammunition.
Soldiers have been taping shaving mirrors to their bayonets and using them to peek around corners since the Siege of Petersburg.
They’ve been devising various Rube Goldberg contraptions to shoot around corners or over obstructions without exposing their bodies for about as long. Those tend to not be as popular, because soldiers seldom spend enough time shooting around corners to justifying the sacrificed they make (less range, more weight, less maneuverability) in using them.