With Civilian use I really don’t see a big issue with key mod. It’s trim design and light weight.98%of us throw on a flashlight and fore grip then call it a day anyway. Most take a class or shoot with it at the range every now and then to stay proficient.. that’s far from the amount of abuse reported in the crane report.
For the same cash you can buy MLOK and not have pieces falling off your gun and sharp places to cut yourself. If someone gives you keymod for free. Yeah I'd agree. Otherwise its crap.