Derya Arms Island Complete Upper Slide 3.86 Ported Barrel Optics Ready Fits GLOCK 19 Gen 4 and DY9 Frames Melonite Finish Black. Compatible with the Frames for DY9 and Frames for GLOCK 19 Gen 4 this complete upper blends timeless performance with modern accessibility transforming your pistol into a precision powerhouse. Whether for home defense range sessions or competition the DY Island Barrel Upper unlocks sharpshooter potential with every round. Specifications for Derya Arms Island Complete Upper Slide 3.86 Ported Barrel Optics Ready Fits GLOCK 19 Gen 4 and DY9 Frames Melonite Finish Black: Manufacturer: Derya Arms Color: Black Finish: Black Additional Features: Slide Handle Color: Black Features of Derya Arms Island Complete Upper Slide 3.86 Ported Barrel Optics Ready Fits GLOCK 19 Gen 4 and DY9 Frames Melonite Finish Black: Complete Slide Package Contents: Derya Arms Island Complete Upper Slide 3.86 Ported Barrel Optics Ready Fits GLOCK 19 Gen 4 and DY9 Frames Melonite Finish Black