The G17C is the compensated variant with dual ports cut through the barrel and slide to redirect propellant gases upward, reducing muzzle rise. Gen3 frame. The compensated variants were discontinued for most models by Glock around 2010 due to safety concerns with mounted weapon lights. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 17 Year introduced: 1998, Austria Weight: 24.69 oz Overall length: 7.32" Status: Discontinued Intended use: Law Enforcement, Competition, Service