The Derya Firearms UP-DY9ISL-AG Island Complete Upper 9mm is a dedicated slide and barrel assembly that brings the DY9 Island barrel concept to Glock 19 Gen 4 and DY9 frames. Its 3.86" ported island barrel shifts mass forward and vents gas through four top ports to cut muzzle rise, while the optics-ready slide includes an RMR cut for easy mounting of a red dot sight. A fixed fiber optic front sight keeps the aiming point bright and consistent, and the lighter slide design helps the pistol track smoothly through recoil.

This complete upper is ideal for shooters looking to upgrade an existing Glock 19 Gen 4 or DY9 frame for range use, competition, or home protection with improved control and faster follow-up shots. The combination of enhanced recoil management, stable sight picture, and optics-ready configuration makes it a practical choice for building a precise, confidence-inspiring pistol. Derya’s focus on thoughtful engineering and modern features is evident in the Island Upper’s balanced feel and clean execution.

Key Features:

• Manufacturer: Derya Firearms
• Model: UP-DY9ISL-AG Island Upper Complete Slide
• Caliber: 9mm Luger
• Barrel Length: 3.86" ported island barrel
• Sights: Fixed fiber optic front sight
• Optic Footprint: RMR cut, optics ready
• Unique Features: Four top-mounted gas ports for reduced muzzle rise, lighter slide for faster cycling
• Condition: New