Glock G19 Gen4 9mm Luger Custom with Derya DY9 Island Barrel Upper, Ported/Comp Housing, RMR-Cut Slide, 20+1 Capacity
This Glock G19 Gen4 stands out with a Derya DY9 Island Barrel complete upper and a set of installed upgrades built for control and fast handling. The upper features a ported island barrel with an integrated comp-style muzzle block and extensive slide windowing, and the slide includes an RMR-pattern optic cut with a cover plate. A flat-faced skeletonized trigger shoe, an installed MW-PRO19 magwell funnel, and extended magazine base pads raise capacity to 20+1. Two 20-round magazines and Derya-branded cases are included.
The Derya DY9 system uses an island barrel with four top gas ports and an integrated ported muzzle block/comp-style housing, designed to help manage muzzle movement. The front sight mounts to the island barrel; a front sight is included in the sale but is not currently installed. The upper is finished in black Melonite.
The slide is heavily windowed and cut with forward and rear cocking serrations for positive manipulation. An RMR-pattern optic cut is present and currently covered with a plate. The standard Glock accessory rail is retained on the dust cover, and an under-barrel Picatinny rail extension is installed.
Controls and ergonomics are enhanced with an installed flat-faced skeletonized trigger shoe with safety lever and a grip funnel/magwell marked "CAGE: 69CZS P/N: MW-PRO19" for smoother reloads. The Gen4 frame keeps the RTF texture with finger grooves. Two Glock factory 9mm magazines are included, each fitted with aftermarket extended aluminum base pads to achieve a 20+1 capacity.
Chambered in 9mm Luger with a 4 in barrel, this compact Gen4 retains Glock’s polymer frame construction and trigger safety. Rear sights are a notch with two green dots, and the included front sight (not installed) is intended to mount on the island barrel. Proof marks read "MADE IN AUSTRIA GLOCK, INC., SMYRNA, GA."
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Scratches and blemishes are present on exterior surfaces. A front sight is provided but not installed, and no screw for installation is included.
What’s Included
- Derya-branded soft pistol case
- Derya Island Kit hard case
- Front sight (no screw)
- Two 20-round Glock 9mm magazines with aftermarket extended aluminum base pads installed
- Installed grip funnel/magwell marked "CAGE: 69CZS P/N: MW-PRO19"
- Installed aftermarket flat-faced skeletonized trigger shoe
- Installed under-barrel Picatinny rail extension