A Gauss rifle is a type of gauss weapon, also sometimes known as a "coil gun". It resembles an auto rifle in size and weight, has about the same range, but does slightly more damage. Gauss rifles can fire either single shots or bursts..
Gauss rifles are often issued to government or security forces. Their possession/use is forbidden or heavily regulated in several jurisdictions because of their stealth capabilities.
This item by ChrisDonovan. The image I made myself using Pimp My Gun.