Glock 19C Gen4 9mm 15-Round Pistol with Ported Barrel for sale. The GLOCK 19C Gen4 marks the first time a compact C pistol has been offered as part of the Gen 4 family. The GLOCK 19C Gen4 is equipped with integral barrel ports which optimize performance during rapid firing allowing the shooter to get back on target quicker. Additional benefits are reduced muzzle flip and felt recoil. The GLOCK 19C Gen4 also features the Modular Back Strap system, which allows shooters to customize the pistol’s grip to accommodate any hand size, Gen4 rough textured technology on the frame, and a dual recoil spring assembly. The G19C Gen4 9x19mm pistol also retains the GLOCK accessory rail for accessory attachments.