The Derya Firearms DY9 Island Kit is a striker-fired, semi-automatic 9mm Luger pistol with a 3.86-inch black Melonite steel barrel. The frame is black Melonite polymer and the slide is optics-ready with an RMR footprint cut and front and rear serrations. It uses an Island Barrel Design with top-mounted gas ports intended to keep the muzzle flatter during recoil. 
 

Key Specifications 

• Brand: Derya Firearms 
• Model: DY9 Island Kit 
• Caliber: 9mm Luger 
• Action: Semi Auto 
• Capacity: 10+1 
• Barrel Length: 3.86" 
• Finish: Black Melonite 
• Frame Material: Polymer 
   

Detailed Features 

• The Island Barrel Design uses four top-mounted gas ports positioned to help reduce muzzle rise during recoil. 
• The optics-ready slide has an RMR-footprint cut for mounting a compatible red dot, along with front and rear serrations. 
• A fixed front sight is installed for use with or without an optic mounted. 
• The grip includes interchangeable backstraps so the frame can be adjusted to different hand sizes. 
• The kit ships with three magazines along with cleaning accessories for setup and maintenance.

Owners of the DY9 Island Kit tend to describe it as a solid value pistol from Derya, with the Melonite-coated barrel and slide holding up well to regular range use. A common complaint is a stiffer factory recoil spring on early rounds through the gun, though most say it smooths out with use.

The Island Barrel Design's top-mounted gas ports are the most talked-about feature, and shooters who run it with a red dot on the RMR-cut slide like how flat the pistol feels shot to shot. The interchangeable backstraps also come up often as a plus for getting the grip to fit different hand sizes.

On value, the DY9 Island Kit is usually framed as a lot of pistol for the money next to name-brand optics-ready 9mm guns, especially with three magazines and cleaning gear included in the box. The tradeoff some mention is aftermarket holster and accessory support being thinner than for more established platforms.