The Derya DY9 Island Complete Slide Assembly (Derya part no. UP-DY9ISL-AG) is a 9mm slide assembly built around Derya’s Island Barrel design, which moves compensating gas ports onto the barrel itself instead of the slide. Four top-mounted gas ports on the barrel vent gas upward to fight muzzle rise directly at the source, shifting mass forward for flatter recoil and faster follow-up shots. The slide is cut for a Trijicon RMR optics footprint and carries a fixed fiber optic front sight, and it’s built to fit both Derya DY9 frames and Glock 19 Gen 4 frames.

Key Specifications

• Chambered in 9mm.
• Features Derya’s Island Barrel design — the barrel itself carries four top-mounted gas ports to fight muzzle rise.
• Cut for a Trijicon RMR optics footprint.
• Fiber optic front sight.
• Fixed sights.
• Fits Derya DY9 frames.
• Also fits Glock 19 Gen 4 frames.
• Ships at approximately 2.6 lb.
• Shifts mass forward into the barrel for flatter recoil and faster follow-up shots.

Frequently Asked Questions

Will this fit my Glock? Yes — this Island slide assembly is designed to fit both Derya DY9 frames and Glock 19 Gen 4 frames.

What does the Island Barrel design do? It moves the compensating ports onto the barrel itself with four top-mounted gas ports, reducing muzzle rise for flatter recoil and faster follow-up shots.

Is this slide optics-ready? Yes, it’s cut for the Trijicon RMR optics footprint.

Buy the Derya DY9 Island Complete Slide Assembly, 9mm, Optics-Ready

Order the Derya DY9 Island Complete Slide Assembly, 9mm, Optics-Ready from a Lubbock, TX gun shop for fast, reliable shipping. Shop more Derya gear or browse the handgun slides category at Schaefer Defense.