The A2 rear sight is a classic and reliable component of the AR-15 platform, known for its durability and simplicity. Whether you're building a new AR-15 or upgrading an existing one, understanding the A2 rear sight kit and its various aspects is crucial. This guide provides a comprehensive overview, helping you choose the right kit and ensuring proper installation.
Understanding the A2 Rear Sight
The A2 rear sight, often referred to as the "fixed rear sight," is a non-adjustable sight that's integral to many AR-15 builds. Its simple design and robust construction make it a popular choice among shooters, especially those prioritizing reliability in challenging environments. Unlike adjustable sights, the A2 sight offers a fixed aperture, typically with a .0625" or .078" aperture diameter, providing a consistent point of aim. While its fixed nature limits precision adjustments, its simplicity and ruggedness are undeniable advantages.
Key Features of an A2 Rear Sight Kit:
- Durability: Constructed from steel, these sights can withstand significant recoil and abuse, making them ideal for various shooting scenarios.
- Simplicity: Their straightforward design ensures ease of use and minimal maintenance.
- Reliability: The simple mechanism translates into reliable functionality, even under duress.
- Cost-effectiveness: A2 rear sight kits are generally more affordable than adjustable rear sights.
- Compatibility: They're widely compatible with standard AR-15 upper receivers.
Choosing the Right A2 Rear Sight Kit
While the basic design remains consistent, several factors should be considered when selecting an A2 rear sight kit:
1. Material:
Most A2 rear sights are made of steel, offering superior durability. However, some manufacturers offer aluminum versions, which are lighter but potentially less robust. Consider the intended use of your firearm when making this decision. For heavy use or harsh conditions, steel is the preferred choice.
2. Manufacturer:
Several reputable manufacturers produce high-quality A2 rear sights. Researching brands and reading user reviews can help you identify a reliable and trustworthy supplier. Look for manufacturers known for their precision and quality control.
3. Included Components:
A complete A2 rear sight kit typically includes the rear sight itself, along with any necessary mounting hardware. Ensure the kit is compatible with your specific AR-15 upper receiver.
Installation of an A2 Rear Sight Kit
Installing an A2 rear sight is generally straightforward, but caution and precision are necessary. Always ensure your firearm is unloaded and clear before performing any maintenance or modifications.
The process typically involves:
- Aligning the sight: Carefully align the sight with the existing dovetail on the upper receiver.
- Securing the sight: Use the provided screws or pins to firmly secure the sight in place.
- Verification: Once installed, verify that the sight is properly aligned and secure.
Maintaining Your A2 Rear Sight
Regular cleaning and lubrication are essential for maintaining the optimal performance of your A2 rear sight. Use a suitable cleaning solvent and lubricant to remove dirt and debris and to ensure smooth operation. Avoid excessive force when cleaning or manipulating the sight.
Conclusion
The A2 rear sight kit remains a popular and reliable choice for AR-15 owners. Its simplicity, durability, and cost-effectiveness make it a valuable component for any AR-15 build. By understanding the key features, choosing the right kit, and performing proper installation and maintenance, you can ensure the continued accuracy and reliability of your firearm. Remember to always prioritize safety when handling firearms.
