PPU Subsonic 9mm Luger Subsonic 158 Gr Full Metal Jacket FMJ. The new Subsonic Line ammunition is manufactured to strict quality production standards and will exceed all expectations. Subsonic ammunition has been in use by military law enforcement and training because of its lower noise and lower recoil benefits. Give it a try yourself and experience the benefits firsthand and see why subsonic ammunition is gaining popularity with shooters. Specifications for PPU PPS9MM Subsonic 9mm Luger Subsonic 158 Gr Full Metal Jacket (FMJ): Manufacturer: PPU Caliber: 9mm Luger Number of Rounds: 50 Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 158 grain Cartridge Case Material: Brass Muzzle Velocity: 950 ft/s Application: Training Primer Style: Centerfire Package Contents: PPU PPS9MM Subsonic 9mm Luger Subsonic 158 Gr Full Metal Jacket (FMJ) 50 Bx/ 20 PPU PPS9MM Subsonic 9mm Luger Subsonic 158 Gr Full Metal Jacket FMJ 50 Bx/ 20