The Umarex Glock 17/45/19X/19 Gen4 hammer mechanism is an original spare part.
Compatible with VFC-manufactured Umarex pistols such as Glock 17, Glock 17 Gen5, Glock 45, Glock 19X, and Glock 19 Gen4. Please ensure compatibility with your pistol, as not all Umarex Glocks are made by VFC. Part number 82.20.0071