What is a Fixed Rear Sight?
Definition
In the realm of firearms optics, fixed rear sights represent a straightforward, reliable approach to aiming. They’re a non-adjustable, permanently mounted sighting element, usually aperature style or a notch. Unlike their adjustable counterparts, which offer the ability to modify windage and elevation on the fly, fixed sights provide a predetermined point of aim. Their simplicity is a defining characteristic. They consist of a rear component – the AR15 fixed rear sight itself – typically positioned on the upper receiver, and a front sight, located near the muzzle of the rifle. When aligned, these two components create a clear sight picture, allowing the shooter to effectively target their objective.
The core philosophy behind a fixed rear sight centers on its ability to perform reliably under pressure. They’re built to withstand the rigors of frequent use and challenging environments. This inherent durability, combined with their lack of moving parts, makes them exceptionally resistant to malfunctions. The design prioritizes a user-friendly experience, and therefore, is simple to understand and operate, making them a great option for new shooters. The fixed rear sight represents a dependable and effective solution for aiming, especially in situations where speed and consistency are paramount.
Benefits of Using Fixed Rear Sights
The enduring popularity of AR15 fixed rear sights stems from a multitude of advantages, including durability, simplicity, cost-effectiveness, and lightweight design, all of which contribute to a user-friendly and reliable shooting experience.
Durability and Reliability
The fixed rear sight excels when it comes to taking a beating. The sturdy construction helps them stand up to impacts, bumps, and the harsh realities of outdoor use. Without any moving parts, the chances of malfunction are significantly reduced. Unlike some adjustable sight systems, there are no complex mechanisms to break or become misaligned. This steadfast design makes a fixed rear sight ideal for self-defense scenarios or environments where constant adjustment may be impractical or impossible. It provides a consistent point of aim, even when put through considerable stress.
Simplicity
In the high-stakes world of shooting, the value of a simple, intuitive system cannot be overstated. Fixed rear sights provide exactly that. They offer a clear and uncluttered sight picture, minimizing the learning curve and allowing shooters to quickly acquire targets. This simplicity translates into faster target acquisition, particularly beneficial in dynamic shooting environments. This ease of use is particularly appealing for beginners, making the AR15 fixed rear sight an excellent choice for those new to the sport. It reduces the complexity of the aiming process, letting shooters focus on fundamentals.
Cost-Effectiveness
While optics have proliferated in recent years, not everyone requires or can afford the latest high-tech sighting systems. Fixed rear sights represent an extremely economical choice. They are often significantly more affordable than adjustable sights, red dot sights, or scopes, making them accessible to a broader range of shooters. Choosing an AR15 fixed rear sight allows users to invest in other essential rifle components or ammunition without sacrificing their ability to hit their targets. The affordable nature of the fixed rear sight makes it a wise option, especially for those building their rifle on a budget.
Lightweight Design
Weight is a crucial consideration for many shooters, and the design of the fixed rear sight typically contributes very little to the overall mass of the rifle. The lightweight nature of fixed rear sights means that they won’t significantly impact the maneuverability or balance of the AR-15. The minimal addition of weight makes them ideal for shooters who prioritize agility and a streamlined rifle configuration.
Backup Option
The inclusion of a fixed rear sight provides a reliable backup system. In situations where a primary optic, such as a red dot sight or scope, malfunctions or is damaged, the fixed rear sight can immediately take over. This redundancy ensures that the shooter always has a functional sighting method available, regardless of the circumstances. The fixed rear sight offers peace of mind and ensures you are always prepared for any eventuality.
Types of Fixed Rear Sights
The world of AR15 fixed rear sights offers a diverse range of designs, each tailored to specific preferences and applications. Understanding these variations is crucial in selecting the ideal setup for your individual needs.
A2 Style (Carry Handle)
This design is instantly recognizable and stands as the classic configuration. Featuring an integrated carry handle, the A2 sight, often found on older AR-15 models, offers a robust and reliable sighting system. It typically features a dual-aperture rear sight, offering a choice between a smaller aperture for longer-range shooting and a larger aperture for close-quarters engagement. This AR15 fixed rear sight system is fully adjustable for both windage and elevation, allowing for precise zeroing. It offers excellent durability and is a solid choice for those seeking a traditional aesthetic.
Low-Profile/Flip-Up Fixed Sights
For those who prioritize a streamlined rifle design or plan to use optics, low-profile or flip-up sights are an excellent option. They sit close to the receiver when not in use, allowing for an unobstructed view when using a scope or red dot sight. In the event of optic failure, these fixed rear sights can be quickly deployed, providing a reliable backup solution. Numerous manufacturers produce these sights, and choosing the right one boils down to quality, durability, and ease of use. They are favored for their discreet profile and ease of use.
Integrated with Handguards
Some modern handguards offer integrated fixed rear sights. These are often crafted into the handguard itself, creating a seamless and durable system. This design reduces the number of mounting points and maximizes the rail space. This type of integrated fixed rear sight can offer unique aesthetic qualities and superior durability. Some of these handguards also incorporate M-LOK or KeyMod slots, allowing for the attachment of additional accessories.
Installation and Mounting
Successfully mounting an AR15 fixed rear sight is a straightforward process, even for those new to firearms.
To get started, you’ll need the following tools:
- Appropriate mounting hardware that is provided with the new sight.
- Torque wrench (highly recommended for proper tightening)
- Small level (optional, but recommended for ensuring the sight is level with the rifle)
- Cleaning solvent and lint-free cloth (for preparing the mounting surface)
Follow these steps for proper installation:
- Surface Preparation: Ensure the rail on your upper receiver is clean and free of any debris. A light wipe with a solvent and a lint-free cloth will prepare the mounting surface.
- Placement: Position the fixed rear sight onto the appropriate rail (usually a Picatinny rail) on the upper receiver. Determine the desired position based on your setup, optic choice (if any), and eye relief.
- Tightening: Using the appropriate screws, attach the sight to the rail. Tighten the screws to the manufacturer’s specifications using a torque wrench. Overtightening can damage the sight or rail, while under-tightening can lead to movement or loss of zero.
- Leveling (Optional): Using a small level, you can ensure that the fixed rear sight is level with the rifle.
Always double-check the mounting hardware to make sure the screws are properly tightened. If your sight has screws that loosen with use, consider applying Loctite to them. If you are not comfortable with any of these steps, consult a gunsmith.
Sighting in Your Fixed Rear Sight
Achieving accurate shots requires proper zeroing of your AR15 fixed rear sight. The zeroing process involves adjusting the sight to align with the point of impact of your chosen ammunition at a specific distance. Here’s a simplified procedure:
- Establish a target distance: Common distances are 25 yards for close-range zeroing or 100 yards for longer-range shooting.
- Mount a target: Use a target appropriate for the distance chosen, such as a silhouette target. Place the target downrange at your established distance.
- Fire a group of shots: Fire a small group of three to five shots at the target.
- Assess the point of impact (POI): Determine the average location of your shots relative to your point of aim.
- Adjust the sight: Use the windage and elevation adjustments on the fixed rear sight to move your shots closer to your point of aim. The adjustments are typically marked, showing the direction of the adjustment.
- Repeat: Repeat the process of firing a group of shots and adjusting the sight until your shots are consistently hitting the target where you are aiming.
Once zeroed, you are ready to experience the accuracy the fixed rear sight offers.
Maintenance and Care
Taking good care of your AR15 fixed rear sight ensures longevity and reliable performance. Regular inspection and cleaning are crucial.
Cleaning
Routinely wipe down your fixed rear sight with a clean cloth to remove dirt, dust, and debris. Use a solvent designed for firearms if necessary, but avoid abrasive cleaners that could damage the finish.
Inspection
Regularly check the sight for any signs of damage, such as scratches, dents, or loose screws. Ensure that the screws securing the sight to the rifle are properly tightened.
Storage
Store your rifle in a safe place away from extreme temperatures and moisture. This will help to prevent corrosion and other forms of damage.
Following these simple maintenance tips, you’ll preserve the life of your fixed rear sight and its effectiveness.
Choosing the Right Fixed Rear Sight
Selecting the best AR15 fixed rear sight for your AR-15 depends on a few factors, with intended use, budget and personal preference being key considerations.
Intended Use
Define how you’ll use the rifle. Is it for casual range time, tactical applications, or home defense? The intended application should drive your decision-making. Tactical applications might benefit from durable, low-profile sights, while target shooting could benefit from a more traditional, accurate configuration.
Budget
Determine your financial constraints. Fixed rear sights come in a wide range of prices, but most are very affordable.
Compatibility
Make sure that the fixed rear sight is compatible with other components, such as your front sight and any optics you may be using. Consider rail heights and ensure that the sight picture will not be obstructed.
Personal Preference
Above all, choose a sight that feels comfortable and intuitive to you. Consider the sight picture, the ease of use, and the overall design.
Choosing a brand name is always a good idea to ensure quality and longevity. Some top manufacturers include Magpul, Daniel Defense, and Troy Industries.
Conclusion
AR15 fixed rear sights provide an essential and often overlooked component for effective shooting. They offer a blend of dependability, simplicity, and affordability that appeals to a wide range of shooters. From the classic A2 style to modern low-profile designs, the variety in the AR15 fixed rear sight market ensures a perfect fit for virtually every AR-15 configuration and use case. The ease of installation and maintenance, coupled with their inherent reliability, makes the AR15 fixed rear sight a valuable asset for any AR-15 owner. By understanding the benefits and options available, you can select the perfect AR15 fixed rear sight to enhance your rifle’s performance and boost your confidence on the range or in the field.
