Stun gun

The Stun gun, officially called the Buzzkill TND, is a weapon in Deus Ex: Human Revolution.

Use
The Buzzkill Threat Negation Device (TND) instantaneously knocks individual targets unconscious at close range. Also useful on bots and electronic devices to confuse them temporarily, the stun gun is made by Mustang Arms Ad-Tech Ltd. As both are ranged, non-lethal firearms which can only load one shot at a time, both the stun gun and its cousin the PAX-22 fill a similar niche, albeit at different ranges. The small stun gun is only useful at short-shorter medium ranges, but can affect non-human targets. With its scope, the PAX-22 is best used at sufficient range for the scope to not interfere with aim.

In-game Description
The Buzzkill Threat Negation Device (TND) is a single-shot, non-lethal firearm that uses an intense electroshock discharge to render targets unconscious. While easy to conceal, the weapon has a short range, slow firing cycle, and lengthty reload time. It is primarily for use against organic targets, but is also effective in temporarily disabling security camera, turrets and bots.

Note
The Buzzkill Threat Negation Device cannot be upgraded.