Does the Smith and Wesson auto function in double action only mode?
Specifically no.
Most Smith & Wesson pistol models are both double and single
action, meaning that they may be cocked for single action and also
operated by trigger pull alone in double action.
However some Smith & Wesson automatic pistols are double
action only (DAO) and are designed for double action alone.
These pistols may not be cocked and are operated by a long
trigger pull.