Discovering the Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper: My Take
As someone who’s spent over a decade putting gear through its paces in everything from dusty workshops to controlled lab environments and out in the unforgiving field, I’ve learned to appreciate components that offer both robust performance and thoughtful design. The Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper arrived on my workbench at a time when I was looking to refine the optics-ready capability of a personal Glock 43. The promise of a precision-machined, complete upper with an integrated RMSc cut was particularly appealing, aiming to streamline the process of upgrading my firearm. While I briefly considered other manufacturers known for Glock slides, Zaffiri Precision’s reputation for tight tolerances and quality materials piqued my interest for this specific application. My initial impression upon unboxing was one of solid craftsmanship; the finish was uniform, and the machining evident. This wasn’t just a piece of metal; it felt like a component built with intent and precision.
Real-World Testing: Putting Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper to the Test
First Use Experience
My initial testing grounds for this complete upper were the familiar confines of my home workshop and a local indoor shooting range. The primary objective was to integrate an RMSc-footprint red dot sight and assess the overall fit and finish when mated with a standard Glock 43 frame. I mounted a Sig RomeoZero optic, noting the secure feel of the mounting screws and the clean fit within the slide’s cut. The transition from my factory slide to this Zaffiri Precision unit was straightforward, requiring no special tools beyond what’s standard for firearm maintenance.
During the first range session, the Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper performed admirably. Functionality was flawless, with the firearm cycling ammunition reliably through a full magazine of 9mm rounds. The weight and balance felt comparable to the factory slide, neither adding undue heft nor feeling noticeably lighter.
Extended Use & Reliability
After several hundred rounds and a few months of regular handling – including being part of my EDC rotation and occasional range trips – this complete upper has proven its mettle. The Cerakote finish has held up remarkably well, showing only minor cosmetic rub marks where it interfaces with my holster, which is expected. There’s no discernible degradation in the slide’s function; cycling remains smooth, and the extraction and ejection are consistently clean.
Maintenance has been as simple as any other quality firearm component. A basic field strip for cleaning and lubrication is all that’s required. The RMSc optic cut has maintained its integrity, with no signs of stress or damage from the optic’s mounting screws. Compared to some budget aftermarket slides I’ve encountered in the past, the tolerances on this Zaffiri Precision unit remain exceptionally tight, indicating a high level of durability and resistance to wear.
Breaking Down the Features of Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper
Specifications
The Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper is constructed from a single billet of 17-4 stainless steel, a premium material chosen for its strength and corrosion resistance, forming the foundation of the slide. This robust material is then finished with a durable Cerakote coating, offering an added layer of protection and aesthetic appeal. The RMSc Cut is specifically engineered to accommodate optics with the Shield RMSc footprint, which importantly also includes compatibility with popular models like the Holosun 407k/507k and Sig Romeo Zero.
This particular optic cut is characterized by its NO rear lugs and slightly lowered front lugs, a design choice that ensures broad compatibility across these three major optic manufacturers. An optic cover plate is included, which is a thoughtful addition for those who might not immediately mount an optic or wish to protect the slide cut. The slide also comes complete with all necessary internal parts and sights, making it a truly complete upper ready for installation on a Glock 43 or 43X frame. The screws utilized for optic mounting are standard 6-32 thread, and the manufacturer wisely recommends blue Loctite for secure sight retention, a best practice for maintaining optic zero.
Performance & Functionality
The core function of a firearm component is its reliability, and in this regard, the Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper excels. It reliably cycles through a variety of 9mm ammunition, from standard range loads to defensive rounds, without any malfunctions. The tight tolerances inherent in its construction contribute to a consistent and predictable shooting experience.
The most significant functional upgrade this slide provides is its integration with modern micro-red dot sights. The RMSc optic cut is precisely machined, ensuring a rock-solid mount for compatible optics. This secure mounting is crucial for maintaining zero, especially under the recoil of live fire and the rigors of everyday carry.
Design & Ergonomics
From a design standpoint, the Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper is both functional and aesthetically pleasing. The 17-4 stainless steel construction provides a substantial feel, and the Cerakote finish is applied evenly, offering a smooth and professional look. The slide’s lines are clean, and the serrations at the rear provide a good grip for slide manipulation, like racking or press-checking.
The placement of the optic cut, positioned forward of the factory rear sight location, is a common and effective design for maintaining the ability to use iron sights as a backup. This thoughtful placement ensures that the optic does not obstruct the view of the iron sights. The overall feel in hand is solid and well-balanced, contributing to confident handling of the firearm.
Durability & Maintenance
Built from 17-4 stainless steel and finished with Cerakote, the durability of this complete upper is a significant selling point. The stainless steel base offers inherent resistance to corrosion and wear, while the Cerakote adds a robust outer layer that can withstand abrasion and environmental exposure. After extended use, the slide shows minimal signs of wear beyond typical holster contact points.
Maintenance is straightforward, requiring standard firearm cleaning and lubrication practices. The RMSc cut is easy to clean, and the tight tolerances mean there’s less opportunity for debris to accumulate and impede function. There are no particularly delicate components in the slide assembly itself that require special care beyond what is typical for quality firearm parts.
Accessories and Customization Options
This complete upper arrives ready to go, inclusive of the slide, barrel, and internal parts, which means it’s largely a self-contained unit. However, the primary “accessory” integration is, of course, the optic. The RMSc Cut is designed to accept optics with the Shield RMSc footprint, which importantly broadens compatibility to include popular models like the Holosun 407k/507k and Sig RomeoZero.
Crucially, an optic cover plate is supplied with the unit. This allows users to run the slide without an optic while maintaining protection for the slide cut and a cleaner aesthetic. The inclusion of this cover plate is a small but significant detail that enhances the product’s immediate usability right out of the box.
Pros and Cons of Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper
Pros
- Precision Machining: Constructed from a single billet of 17-4 stainless steel, ensuring tight tolerances and a premium feel.
- Optic Ready: Features an RMSc Cut specifically designed for Shield RMSc footprint optics, including popular models like Holosun 407k/507k and Sig RomeoZero.
- Complete Assembly: Comes as a complete upper, including slide, barrel, internal parts, and sights, ready for installation.
- Durable Finish: Protected by a robust Cerakote finish that offers excellent resistance to wear and corrosion.
- Included Cover Plate: Comes with an optic cover plate, allowing for use without an optic while protecting the slide cut.
Cons
- Optic Footprint Specificity: The RMSc Cut is designed for a specific footprint; users with optics of other dimensions will need to consider alternative slides or adapter plates.
- Price Point: At $499.99, this is a premium aftermarket component and may be a significant investment for some users compared to budget-oriented slides.
Who Should Buy Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper?
This Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper is an excellent choice for Glock 43 and 43X owners looking to upgrade their firearm for the use of modern micro-red dot sights. It’s particularly well-suited for individuals who value precision engineering, durable materials, and a factory-quality fit and finish. The complete upper nature of this product also appeals to those who prefer a drop-in solution rather than assembling components individually.
Those who prioritize a robust and reliable platform for concealed carry or range use, and are committed to using optics like the Shield RMSc, Holosun 407k/507k, or Sig RomeoZero, will find this component an outstanding upgrade. Users who are seeking to add an optic-ready slide without the complexity of a custom slide build would also benefit greatly. However, individuals not planning to mount an optic of the RMSc footprint, or those on a very tight budget, might consider other options.
Conclusion on Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper
The Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper represents a significant step up in quality and capability for Glock 43 and 43X owners. Its construction from 17-4 stainless steel and the flawless Cerakote finish speak to a commitment to durability and aesthetics, while the precisely machined RMSc Cut ensures a secure and reliable platform for compatible micro-red dot sights. The convenience of it being a complete upper means users can achieve a substantial upgrade with a single purchase and relatively straightforward installation.
Considering its robust build, excellent functionality, and thoughtful inclusion of an optic cover plate, the $499.99 price point feels justified for the quality and performance offered. For the discerning shooter seeking to enhance their Glock 43 with top-tier optics-ready capability, I would highly recommend this Zaffiri Precision Glock 43 ZPS.2 RMSc Cut Complete Upper. It’s a product that clearly demonstrates the manufacturer’s expertise in firearm component manufacturing.