Magpul MBUS Rear Sight: Unparalleled Reliability and Performance for Your AR-15/M16 Platform

For any serious firearm enthusiast, tactical operator, or responsible citizen, the question isn't if your primary optic might fail, but when. Whether due to battery depletion, impact damage, or environmental factors, having a robust and instantly deployable backup sighting system is not merely a convenience—it's a critical safety and operational imperative. This is precisely the problem the Magpul MBUS (Magpul Back-Up Sight) Rear Sight, specifically the Olive Drab Green polymer model (MAG248ODG, UPC: 873750004372), is engineered to solve, offering a trustworthy solution when your primary aiming device is compromised.

Imagine a scenario where your red dot sight goes dark in the middle of a critical moment, or your scope is obscured by mud or fog. In such instances, the ability to seamlessly transition to a reliable, always-on backup sight can mean the difference between success and failure, or even safety and danger. The Magpul MBUS Rear Sight is designed for exactly these high-stakes situations, providing immediate, precise, and durable aiming capabilities when you need them most. It's the go-to choice for those who demand uncompromising reliability from their firearm accessories.

Why Every AR-15/M16 Owner Needs Reliable Backup Sights

The modern sporting rifle, particularly the AR-15/M16 platform, is renowned for its versatility and adaptability, often equipped with advanced optics. However, relying solely on electronic or magnified optics presents inherent vulnerabilities. Backup iron sights, like the Magpul MBUS, serve as an indispensable failsafe, ensuring your rifle remains operational regardless of your primary optic's status. They are essential for:

• Optic Failure: The most obvious reason. Batteries die, electronics fail, lenses crack, or zero shifts. Backup sights guarantee you can still aim effectively.
• Close-Quarters Combat (CQB): In dynamic, close-range engagements, traditional iron sights can sometimes be faster for rapid target acquisition, especially if your primary optic is set for longer distances.
• Training & Skill Development: Practicing with iron sights improves fundamental marksmanship, trigger control, and sight alignment—skills that translate to better performance with any optic.
• Weight & Simplicity: For a minimalist setup or when every ounce counts, a lightweight and straightforward backup sight provides essential capability without added bulk or complexity.
• Durability in Harsh Environments: Unaffected by power sources or delicate electronics, mechanical sights are inherently more resilient to extreme weather, impacts, and general wear and tear.

Introducing the Magpul MBUS Rear Sight: Precision Engineered for the AR Platform

The Magpul MBUS Rear Sight (MAG248ODG) stands out as a premier choice for shooters seeking a blend of durability, functionality, and value. This low-cost, color injection molded, folding back-up sight is specifically tailored to the AR-15/M16 platform, seamlessly integrating with most MIL-STD 1913 Picatinny rail equipped weapons. Its Olive Drab Green finish offers a tactical aesthetic that complements many modern firearm configurations, providing both practical utility and a distinctive appearance.

Key Design Features and Operational Advantages

The Magpul MBUS Rear Sight is a testament to thoughtful engineering, packed with features that enhance user experience and tactical effectiveness:

• Dual Aperture System: This sight incorporates a versatile dual-aperture system. You can quickly switch between a large aperture for rapid target acquisition in close-quarters or low-light conditions and a smaller, more precise aperture for accurate shots at longer ranges. This adaptability ensures optimal performance across diverse shooting scenarios.
• Spring-Loaded Flip-Up Mechanism: The hallmark of the MBUS system is its intuitive, spring-loaded deployment. The sight can be effortlessly activated from either side of the rifle or by simply pressing the top release button. This ensures lightning-fast deployment when seconds count, allowing for immediate transition from a failed primary optic to a functional backup.
• Robust Polymer Construction: Crafted from Magpul's proprietary high-impact polymer, this sight offers an exceptional strength-to-weight ratio. It's incredibly durable, capable of withstanding significant abuse, yet remains remarkably lightweight at just 1.30 ounces. This material choice not only contributes to its resilience but also helps minimize overall rifle weight.
• Precise Windage Adjustments: The MBUS Rear Sight features a detent knob for easy and positive windage adjustments. Each click offers a fine degree of adjustment, ensuring precise zeroing for your specific rifle and ammunition.
  • For rifles with a 14.5" sight radius, each click adjusts windage by 0.7 MOA (Minutes of Angle), equivalent to 0.754 inches at 100 yards/meters.
  • For rifles with a 20" sight radius, each click provides 0.5 MOA, equivalent to 0.547 inches at 100 yards/meters.
  This level of precision allows shooters to dial in their sight for optimal accuracy.
• Protective Wings: The sight's design includes protective wings that shield the dual, same-plane flip apertures from impact and damage. This crucial detail ensures the delicate sight elements remain safe and functional even in rugged field conditions.
• Low-Profile Stowed Position: When folded down, the MBUS Rear Sight boasts an incredibly low profile, measuring only 2.6 inches in length. This design minimizes the risk of snagging on gear or vegetation, and it allows ample space for other rail-mounted accessories such as optics, lights, and lasers. When deployed, its length is a mere 1.5 inches, presenting a compact and efficient aiming solution.
• "Made in the USA" Quality: Like many Magpul products, the MBUS Rear Sight is proudly manufactured in the USA. This signifies a commitment to high manufacturing standards, quality control, and supports domestic production, building trust among discerning consumers.

Important Compatibility Considerations

While the Magpul MBUS Rear Sight is highly versatile, it's crucial to understand its specific compatibility requirements to ensure optimal performance and avoid common installation issues:

• Picatinny Rail Mounting: The sight is designed to mount securely to any MIL-STD 1913 Picatinny Rail or STANAG 4694 Rail. This is the standard for most modern AR-15/M16 upper receivers and compatible handguards.
• Same Plane Requirement: For accurate co-witnessing and reliable aiming, the Magpul MBUS Front Sight (if used) must be mounted to a railed fore-end that is on the same plane as the receiver rail. This ensures proper sight alignment and a consistent sight picture.
• Gas Block Mounting Restriction: Due to the extreme heat generated by the gas block on an AR-15/M16, the Magpul MBUS Rear Sight (and its front counterpart) cannot be mounted directly to a railed gas block. This is a critical safety and functionality note, as excessive heat can deform the polymer material and compromise sight integrity.
• MOE Hand Guard Incompatibility: Please note that this sight is not compatible with Magpul's MOE Hand Guards that lack a top rail section. It specifically requires a Picatinny top rail for mounting. Users with MOE Hand Guards would need to add a compatible rail section or upgrade to a different handguard system with integrated Picatinny rails.

Who Can Benefit from the Magpul MBUS Rear Sight?

The Magpul MBUS Rear Sight is an ideal accessory for a broad spectrum of users, including:

• New AR-15 Owners: Provides an excellent, affordable starting point for backup sighting systems.
• Budget-Conscious Shooters: Offers high-quality performance without the premium price tag of metal sights.
• Tactical Professionals: Law enforcement, military personnel, and private security contractors can rely on its robust construction and rapid deployment for mission-critical applications.
• Competitive Shooters: A dependable backup for 3-Gun or other dynamic shooting sports where primary optic failure could cost valuable time.
• Hunters: Ensures a reliable aiming solution in the field, especially if primary optics are damaged or fail.
• Home Defense Enthusiasts: A dependable, always-on sight for peace of mind in high-stress situations.
• Trainers and Instructors: Recommending a durable and affordable option for students.
• Custom Builders: An excellent addition for a lightweight and functional rifle build.

Installation and Maintenance Tips

Installing the Magpul MBUS Rear Sight is a straightforward process that can typically be completed in minutes with basic tools:

• Preparation: Ensure your firearm is unloaded and pointed in a safe direction. Gather the necessary tools, usually a 3/32" hex key (Allen wrench).
• Mounting Position: Determine the optimal position on your Picatinny rail. Generally, the rear sight is mounted as far back on the upper receiver as possible to maximize sight radius for greater accuracy.
• Secure Attachment: Loosen the mounting screw on the MBUS sight, slide it onto the Picatinny rail, and then firmly tighten the screw. Ensure it is snug but do not overtighten, as this can damage the rail or the sight.
• Zeroing: After installation, it is crucial to zero your new sights at your desired distance (e.g., 25 yards, 50 yards). This involves making windage adjustments until your shots consistently hit your point of aim. Remember the MOA adjustments discussed earlier.
• Routine Maintenance: Keep your MBUS sight clean of dirt, debris, and carbon buildup. A soft brush and cloth, along with a mild cleaning solution if necessary, will suffice. Regularly check the mounting screw for tightness, especially after heavy use.

Why Choose Magpul Products from DEGuns?

Magpul is a globally recognized leader in the firearm accessories industry, synonymous with innovation, durability, and user-focused design. Their products, including the MBUS sights, are rigorously tested to perform under the most demanding conditions, earning the trust of military, law enforcement, and civilian shooters worldwide. When you choose Magpul, you're investing in a product that is not only built to last but designed to enhance your shooting experience and ensure critical functionality.

At DEGuns, we are proud to offer a comprehensive selection of Magpul products, including the highly sought-after MBUS Rear Sight (MAG248ODG). We are committed to providing our customers with authentic, high-quality firearm accessories, backed by expert knowledge and dedicated service. When you purchase from DEGuns, you're not just buying a product; you're gaining access to a trusted source for all your firearm needs, ensuring you receive genuine Magpul items and reliable support. Equip your AR-15/M16 with the dependable performance of the Magpul MBUS Rear Sight, available today at DEGuns.

Product Specifications Table: Magpul MBUS Sight Rear

Feature	Detail
Brand	Magpul
Model	MBUS Sight Rear
Firearm Compatibility	AR-15, M16, AR Platform
Color	Olive Drab Green (ODG)
Frame Material	High-Impact Polymer
Mount Type	MIL-STD 1913 Picatinny Rail / STANAG 4694 Rail
Sight Style	Folding Back Up Sight
Windage Adjustment	0.50 MOA (20" SR) / 0.70 MOA (14.5" SR)
Length (Deployed)	1.5 inches
Length (Stowed)	2.6 inches
Weight	1.30 ounces
Manufacturer Part No.	MAG248ODG
UPC	873750004372
SKU	10216