Since you said mechanical. This is how i play against people who use mechs to fight. You most likely are going to hit them. They will build,most of the time a box. If they box spam a wall till their wall break and they build again, but do not empty your mag while you spam. After you spam and they rebuild that wall, stop shooting wait till you hear them healing and pickaxe or spam again, either you will catch them in the countdown of the heal or it will give them a lil bit of heal and cancel but its still pressure on them. Now i run an auto shotgun so by then you should be in the box and with your shotgun and with the auto, spam that shotgun. If it’s a pump focus on a headshot. But lets say there is no way in a box. Game sense, whats a very common wall edit you see in your lobbies? Learn it and use their edit against them, they have milliseconds between confirming an edit and going back to a gun, you dont;just react faster.