The black rear sight broke off, however it was still usable when flipped to the other rear sight. It is very clunky, doesn't look great and it is heavy. However, it is accurate, easily adjusted with an allen key, rigid, and holds zero. This product is my last choice but it works.

Too much of a glare from the red. No adjustment tool was included. Not what I was looking for

When it comes to backup iron sights for your Picatinny rail, the ST02DR Fiber Optics Front and Rear Sights are an excellent choice for anyone looking to enhance their accuracy. These flip-up sights, with their fiber optics and red design, bring a level of precision and convenience that's hard to beat.The most prominent feature of these sights is the inclusion of fiber optics, which greatly improves visibility and target acquisition. The red color stands out crisply against various backgrounds and lighting conditions, making it easy to focus on your target. Whether you're in bright daylight or low-light scenarios, these sights ensure a clear and vivid aiming point.The flip-up design is a practical feature, allowing you to switch between your primary optics and iron sights seamlessly. It's a handy backup option if your main optic fails, and it's also great for transitioning between close-quarters shooting and longer-range engagements. The locking mechanism is reliable, and the sights stay securely in place when flipped up.Mounting these sights on a Picatinny rail is a breeze, and they align perfectly. They have a solid construction and a tactile and audible click when flipping them up or down. The rear sight is adjustable for windage, making it easy to zero in accurately. The ST02DR sights are compatible with a wide range of devices, and I had no issues installing them on mine.One of the notable aspects of these sights is their lightweight design. They don't add much weight to your device, which is crucial for outdoorsmens who value maneuverability and reduced fatigue during extended sessions.However, it's important to note that the fiber optics are not illuminated, so they rely on ambient light to function optimally. In extremely low-light conditions, you may need to rely on other aiming devices. Additionally, the red color might not be everyone's preference, so it's worth considering personal color preferences and your intended shooting environment.In conclusion, the ST02DR Fiber Optics Flip-Up Sights offer a reliable and convenient solution for enhancing your shooting accuracy. Their fiber optics provide excellent visibility, and the flip-up design is a practical addition for any Picatinny rail. Mounting is easy, and the lightweight design ensures that your firearm remains agile. While they may not be ideal for extreme low-light situations and color preferences vary, these sights deliver on their promise of precision and value for the price. If you're in the market for dependable backup iron sights, the ST02DR is a worthy choice for your setup.

These flip-up sights are very strong, and heavier than I expected. The flip-up switch is a bit difficult to depress, so I'm hoping after a while it will break in and become easier to use. The fiber optic was also underwhelming, but was visible in moderate light. The adjustments are very good, and once you get a laser bore sight installed, you'll have no problem getting on paper, and then with a few refinements, get an accurate aim. The stiffness and the weight, together, cost a star. Even if the stiffness goes away, I still have had the experience of having to struggle to open and close the sights, and the weight will always be the same. They look cool, and the red makes a good contrast to an otherwise plain rifle, but in my opinion they are not worth the extra weight (almost three and a half ounces for the pair), and I'll be keeping these in reserve, in case something happens to my primary flip-up sights, which are from a Taiwan company, and are also made of aluminum, but weigh half as much.Four Star Super Solid but Heavy Flip-up Aluminum Sights