There's no forgetting the only dependable safety is the one between our ears.
Maybe the complaint about the trigger on the auto is that it's not like a Glock, with a short reset.
If his is a Sigma, and it's the copy of a Glock that got S&W in such a hassle, it's surprising that it doesn't have a similar trigger.
The Glock short reset is one of its best features.
Lock the doors, they're coming in the windows.