Airsoft Zeel in the Philippines does a review of the Umarex Glock17 Gen 5 Black gas blowback pistol. The UMAREX Airsoft GLOCK 17 Gen5 is a realistic replica airsoft pistol modeled after the popular GLOCK 17 pistol. It features a metal slide for realistic recoil, a reinforced polymer frame for durability, and a textured grip for better handling. It also has an adjustable hop-up unit for fine-tuning accuracy and a non-threaded outer barrel for unobstructed slide movement.