Why I Chose the Kensight Bomar BMCS & Rollo Sight Elevation Spring Set: A Hands-On Review
My quest for reliable firearm maintenance and tuning led me to the Kensight Bomar BMCS & Rollo Sight Elevation Spring Set. As a seasoned gear specialist with over a decade of experience across diverse environments, I understand the critical role small parts play in the functionality of larger systems. This specific set, designed for Bomar-style sights on 1911 platforms, promised a precise solution for a common issue: worn or inconsistent elevation springs that can throw off zero. My previous experience with a slightly drifting rear sight on a cherished 1911 became the immediate impetus for seeking out a quality replacement. First impressions of these springs were positive; they felt robust, with a satisfying heft that belied their small size. While generic replacements exist, I opted for this branded set for its presumed adherence to original specifications, considering brands like Dawson Precision or even factory Kimber parts as benchmarks. The arrival of this small, yet vital, component brought an immediate sense of relief and a spark of curiosity to get it installed.
Real-World Testing: Putting the Kensight Bomar BMCS & Rollo Sight Elevation Spring Set to the Test
First Use Experience
My initial testing took place on my workshop bench, a controlled environment where I meticulously disassembled the Bomar-style rear sight from my target 1911. The springs were installed immediately after the original ones were removed, noting the distinct difference in tension and smoothness. The process was straightforward, as replacing springs in adjustable sights is a routine maintenance task for me. I encountered no immediate issues or surprises; the fit was snug, and the components seemed to seat correctly within the sight mechanism. The real test, however, would be on the range.
Extended Use & Reliability
After several hundred rounds fired with the new springs, their performance has been consistently excellent. The elevation adjustments remain crisp and positive, with each click feeling distinct and reliable. There are no signs of premature wear, such as deformation or loss of tension, even with frequent range sessions and sight adjustments. Maintenance has been minimal; a light cleaning with a soft brush and occasional application of gun oil keeps them operating smoothly, as expected for such small metal components. Compared to the generic springs I’ve used in the past, which sometimes felt flimsy or inconsistent, these Kensight springs offer a noticeable step up in tactile feedback and perceived durability.
Breaking Down the Features of the Kensight Bomar BMCS & Rollo Sight Elevation Spring Set
Specifications
The Kensight Bomar BMCS & Rollo Sight Elevation Spring Set includes two essential components: one larger outer spring and one smaller inner spring. The outer spring measures approximately 0.220 inches long by 0.154 inches in diameter, while the inner spring is slightly smaller at 0.212 inches long by 0.100 inches in diameter. These dimensions are critical for providing the correct tension and rebound characteristics within the Bomar-style sight mechanism.
The material specified is 4140 Chrome Moly Steel, a common and highly regarded alloy for its strength, durability, and resistance to wear. This robust material is crucial for a component that undergoes repeated compression and decompression. The use of this high-quality steel means these springs are built to withstand the rigors of frequent sight adjustments and the environmental stresses encountered in shooting.
Performance & Functionality
The primary job of these springs is to provide a consistent and precise tactile click for elevation adjustments on Bomar-style sights. They achieve this admirably, delivering a positive and audible feedback with each increment of adjustment. This is crucial for quickly and accurately returning the sight to a known zero or making fine-tuned corrections under pressure.
One significant strength is the consistent tension they provide. Unlike some aftermarket springs that can feel uneven or “gritty,” these feel smooth and progressive. A minor weakness, if one can even call it that for such a simple part, is that their effectiveness is entirely dependent on the quality of the sight housing they are installed in. If the sight’s internal detent mechanism is worn or damaged, even the best springs won’t perform optimally.
Design & Ergonomics
The design of the Kensight springs is inherently functional and utilitarian, as expected for replacement gun parts. They are manufactured to precise dimensions, ensuring a proper fit within the sight’s internal mechanism. The 4140 Chrome Moly Steel construction not only provides durability but also contributes to a solid, premium feel.
Ergonomically, their influence is felt through the improved operation of the sight itself. The crisp clicks and smooth travel they facilitate make manipulating the elevation adjustment dial a more pleasant and reliable experience. There’s no real “learning curve” with springs; their benefit is immediate once installed and the sight is adjusted.
Durability & Maintenance
Based on the material and my extended use, these springs are built for longevity. Under typical shooting conditions, where sights are adjusted periodically rather than constantly, they should easily last for many thousands of cycles. The 4140 Chrome Moly Steel is inherently resistant to corrosion, though proper gun care will always extend their lifespan.
Maintenance is practically non-existent beyond ensuring the surrounding sight mechanism is clean and lightly lubricated. The springs themselves do not require any special treatment. Potential failure points would typically arise from extreme over-compression or physical damage to the sight, rather than the springs themselves degrading.
Accessories and Customization Options
This set comes as a two-spring pack, providing both the necessary inner and outer springs for a complete elevation mechanism replacement. There are no additional accessories included, as these are specific internal components. Customization options are limited to the selection of the springs themselves; Kensight offers this set for Bomar BMCS and Rollo style sights, implying specific dimensional adherence for compatibility.
Pros and Cons of the Kensight Bomar BMCS & Rollo Sight Elevation Spring Set
Pros
- Precision Fit: Manufactured to exact specifications for Bomar BMCS & Rollo style sights.
- Durable Material: Constructed from 4140 Chrome Moly Steel for long-lasting performance.
- Crisp, Audible Clicks: Provides excellent tactile and audible feedback for precise elevation adjustments.
- Smooth Operation: Contributes to an ultra-smooth adjustment feel within the sight mechanism.
- Cost-Effective Solution: An affordable way to restore or enhance rear sight functionality.
Cons
- Specific Application: Only compatible with Bomar BMCS and Rollo style sights; not universal.
- Small Parts: As with any small gun parts, they require careful handling during installation to prevent loss.
Who Should Buy the Kensight Bomar BMCS & Rollo Sight Elevation Spring Set?
This spring set is an ideal purchase for any 1911 owner who has a firearm equipped with Bomar BMCS or Rollo style adjustable rear sights. It’s particularly suited for competition shooters, law enforcement officers, or hobbyists who frequently adjust their sights for different distances or ammunition. For those experiencing loose clicks, inconsistent adjustments, or a general lack of positive feel in their rear sight’s elevation turret, this set is a must-have.
Anyone who prioritizes precision and reliability in their firearm’s sighting system will benefit significantly. Conversely, individuals with firearms not using Bomar BMCS or Rollo sights, or those who never adjust their sights, would have no need for this specific component. A good gunsmith’s toolkit or a small parts organizer would be a wise investment for anyone working with small firearm components like these springs.
Conclusion on the Kensight Bomar BMCS & Rollo Sight Elevation Spring Set
The Kensight Bomar BMCS & Rollo Sight Elevation Spring Set is a testament to how crucial small, well-manufactured parts can be for the overall performance of a firearm. For its modest price of $5.99, the value delivered in terms of restoring crispness and precision to an adjustable rear sight is exceptional. The use of 4140 Chrome Moly Steel and the adherence to precise dimensions ensure that these springs will perform reliably and durably for a long time.
I would wholeheartedly recommend this spring set to any owner of a compatible Bomar-style sight. It’s an easy, inexpensive, and highly effective way to address worn-out springs and bring your rear sight back to its intended optimal performance. If you’re looking to fine-tune your 1911’s accuracy or simply want to ensure your adjustable sights feel as good as new, this small investment is well worth it.