If you’re building a reliable, optics-ready pistol for home defense or range use, the right barrel is a critical component. The CA19 Pistol RMR Threaded Barrel with Suppressor Height Polymer Sights is a complete upgrade package designed for the modern shooter. This drop-in barrel provides immediate compatibility with muzzle devices and red dot optics, enhancing both functionality and sight acquisition. It’s a straightforward solution for anyone wanting to configure their Gen 3 Glock® 19 without permanent modifications.
Key Features
- Precision-machined, factory-dimension threaded barrel for reliable drop-in fit and performance.
- Threaded muzzle (1/2×28) accepts common pistol compensators, muzzle brakes, or suppressors.
- Includes a set of co-witnessing, suppressor-height polymer sights for immediate use with an RMR-cut slide.
- Enhanced chamber and crown for consistent accuracy and improved feeding reliability.
- Designed specifically for Generation 3 Glock 19 frames and slides for guaranteed compatibility.
- Complete kit arrives ready to install, saving you time and the hassle of sourcing parts separately.
Built For
This barrel and sight kit is ideal for the practical shooter building a duty-ready or home defense pistol. It’s perfect for those who have an aftermarket RMR-cut slide and want to add a red dot while maintaining iron sight backup. It’s also an essential AR-15 Parts category accessory for anyone constructing a pistol-caliber carbine or a dedicated range firearm where a muzzle device is desired.
Specifications
- Caliber: 9x19mm (9mm Luger)
- Thread Pitch: 1/2″ x 28 TPI
- Material: Carbon Steel with a durable black oxide finish
- Compatibility: Gen 3 Glock 19 (Models using Gen 3 parts)
- Sights: Black polymer, suppressor-height, three-dot configuration
FAQ
Is this a drop-in barrel, or does it require gunsmith fitting?
This CA19 barrel is manufactured to factory specifications for a true drop-in installation in Gen 3 Glock 19 slides. No fitting should be required for standard use.
Will these sights co-witness with my red dot sight?
Yes, the included polymer sights are suppressor-height, designed to provide a lower-third co-witness in slides milled for Trijicon RMR-pattern optics.


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