Longsword Whisperhead SERSR

The Longsword Whisperhead SERSR (Suppressed Extreme Range Sniper Rifle) is a weapon in Deus Ex: Human Revolution, appearing only with the Tactical Enhancement Pack.

Background
The Longsword Whisperhead SERSR is a weapon developed by Steiner Bisley.

Characteristics
This is a highly accurate long-range, bolt-action weapon that features a built-in sound suppression system that renders it virtually silent, making the shooter in cover almost undetectable at long range. The sniper can send large caliber rounds against distant targets, thus making it a one-hit kill weapon against non-armored enemies.

Locations

 * Sarif Manufacturing Plant, one is added to the player's inventory at the start
 * Detroit, can be found in Seurat's storage room near the basketball court
 * Hengsha Pangu, one is located on the maintenance catwalk
 * Montreal Picus, one is located in the sub-basement
 * Found on a red container on Belltower Dock, left to the main gate
 * Found at Omega Ranch in storage room with a Level 4 hack panel

Behind the scenes

 * The Longsword Whisperhead SERSR has been probably inspired by three rifles, the AIG Asymmetric Warrior for the adjustable stock and the Remington MSR - Modular Sniper Rifle and CheyTac Intervention for the bolt and the receiver.
 * In third person view, the laser from the laser sight mod comes out of the front of this tube, despite that in the inventory it is shown as a module mounted underneath the weapon.