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Island barrel setups have traditionally lived on high-end custom 2011s and competition guns that cost a small fortune. Derya flipped that script with the DY9 Island, packing the same basic concept into a G19-sized striker-fired pistol made right here in the US at their Jacksonville, Florida facility. The result is a full-featured 9mm that shoots noticeably flatter than what you'd expect from a pistol in this size and price range.
The island barrel design raises a central section of the barrel so the slide rides along more of its surface, which changes how the whole assembly tracks during recoil. Add four top-mounted gas ports to that setup and you get a combination that vents propellant gas upward to actively counteract muzzle flip. Derya rates this at approximately 25% less muzzle rise and 12% less felt recoil compared to a standard barrel. People who've shot it back that up, noting the gun simply doesn't have the same flip as other pistols its size. That translates directly to quicker target reacquisition and tighter split times when you're running multiple rounds.
The trigger is Derya's own Second Wind unit, with short pre-travel, a clean defined wall, and a crisp break and reset. Pull weight runs around 5 pounds. It's the kind of trigger that feels familiar if you've spent time on Glock-pattern guns, but with a noticeably better feel out of the box.
The slide comes with a factory RMR footprint cut, so mounting a Trijicon RMR or similarly footprinted red dot is straightforward with no adapter plate needed. Out of the box you get TruGlo fiber optic sights, with a green fiber rear and a front sight mounted directly to the non-reciprocating barrel island, which minimizes sight movement during the firing cycle. The polymer frame takes four interchangeable backstraps (S, M, L, XL) so the grip fit can be dialed in for different hand sizes. Holster compatibility is also worth mentioning: since the DY9 is dimensionally close to a Glock 19, most G19-pattern holsters work with it, and the Glock-pattern magazines mean your existing mag pouches will likely carry right over too.
The whole package ships in a Derya range bag with a plastic ammo can inside, three 15-round magazines, all four backstraps, a guide rod, cleaning tools, and a user manual.
The island barrel raises a central ridge along the top of the barrel so the slide tracks along more of the barrel's surface during the firing cycle. Combined with four top-mounted gas ports that vent propellant gas upward, the design reduces muzzle rise by around 25% and felt recoil by roughly 12% compared to a standard setup. This feature has traditionally been reserved for expensive custom competition guns, so seeing it on a production pistol at this price point is genuinely uncommon.
In most cases, yes. The DY9 is dimensionally close to a Glock G19, and many G19-pattern holsters fit it well. That said, Derya does not officially guarantee compatibility with every Glock holster, so it's worth confirming with your specific holster before assuming it will drop right in. The island barrel's unique slide profile may affect fit with some more precisely molded Kydex options.
The DY9 Island uses a Glock-pattern magazine and is compatible with magazines designed for the Glock 19 (15-round) and Glock 17 (17-round). Longer 30+ round extended mags also work. When the integrated magwell is attached, some G19 mags with larger base pads may not seat fully, so compatibility can vary slightly by brand.
The slide is pre-milled with a Trijicon RMR footprint using a 6×32 thread pattern with two mounting holes, so any RMR-footprint optic mounts directly without an adapter plate. The kit also includes two optic plates to support additional red dot footprints beyond the direct RMR cut.
Yes. Derya Arms operates a manufacturing facility in Jacksonville, Florida, and the DY9 Island (identified by the "US" suffix in the part number DY9.ISL.US) is produced there. Derya has its origins in Turkey but established US manufacturing specifically to serve the American market.
The DY9 Island ships with Derya's Second Wind Trigger, an in-house design with short pre-travel, a well-defined wall before the break, and a clean crisp reset. Pull weight is approximately 5 pounds, which is right in line with what you'd expect from a carry-oriented striker-fired pistol. People familiar with Glock triggers will find it familiar, but generally better out of the box.
| UPC | 850067243366 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | DY9.ISL.US |
| Action | |
| ATF Type | Pistol |
| Barrel Length | 3.86" |
| Caliber/Gauge | 9mm |
| Capacity | 15 + 1 |
| Color | Black |
| Model | |
| Number of Magazines | 3 15 rd. |
| Package Height | 7.2 |
| Package Width | 5.5 |
| Product Type | Semi-Auto Pistol |
| Safety | Firing Pin/Trigger Block |
| Shipping Weight | 3.8 |
| Sights | Fiber Optic |
| Sights Type | Fixed Sights |
| Slide Description | Optic Ready/Serrated |
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