My Cart: 0 item(s)
AR-15 Rear Sight | Flip-Up & Fixed Rear Sights for AR Rifles | Mounts Plus
AR-15 Rear Sights – Precision Alignment for Every Rifle Build
When it comes to consistent accuracy and tactical readiness, a quality AR-15 rear sight is essential. Whether you're running irons as your primary aiming system or need a reliable backup for your optic, Mounts Plus offers a complete selection of rear sights to suit any shooting style.
Choose from low-profile folding sights, durable fixed sights, rapid-deploy flip-ups, and night-ready tritium options—all from top manufacturers like Troy Industries, Magpul, Midwest Industries, Samson, and more. Every sight we carry is Picatinny-compatible and battle-tested for performance in competitive, defensive, and recreational settings.
✅ Why Choose an AR-15 Rear Sight from Mounts Plus?
-
🎯 Folding, Fixed & Low-Profile Options – For every optic setup or backup need
-
🔧 Fits All MIL-STD-1913 Picatinny Rails – Easy installation on any AR upper
-
🔍 Co-Witness Ready – Compatible with absolute and lower 1/3 red dot setups
-
🌒 Tritium & Night Sight Models – Self-illuminating for low-light engagements
-
🔩 Built to Last – Rugged aluminum, stainless steel, and polymer options
-
🚀 Fast U.S. Shipping – All items ship quickly from our Florida warehouse
📦 Our Most Popular AR-15 Rear Sights
| Product Name | Type | Highlights | Brand |
|---|---|---|---|
| Troy Folding Rear Sight | Flip-Up | Low-profile, zero-retaining | Troy Industries |
| Magpul MBUS Pro Rear Sight | Flip-Up | All-steel, compact, durable | Magpul |
| Samson Manual Folding Rear Sight | Flip-Up | Quick-deploy, rugged construction | Samson Mfg. |
| Midwest Industries Combat Rear Sight | Fixed | Tool-less adjustment, battle-ready | Midwest Industries |
| Aim Sports Diopter Rear Flip Sight | Budget Flip-Up | Affordable, easy to install | Aim Sports |
✔️ Available in black or FDE
✔️ Choose from standard or offset configurations
✔️ Perfect for training, competition, or duty rifles
💬 FAQs – Choosing the Right AR-15 Rear Sight
Q: What is the best AR-15 rear sight for backup use?
A: Flip-up rear sights are ideal backups when using a red dot or scope. They stay out of the way until needed and hold zero reliably.
Q: Can rear sights co-witness with optics?
A: Yes. With the right optic height or riser, you can co-witness your rear sight in absolute or lower 1/3 alignment with your red dot.
Q: Do I need a special tool to install my rear sight?
A: Most rear sights attach directly to any Picatinny rail and require only basic tools, often just a flathead or hex wrench.
Q: What’s the difference between M4 and HK-style sights?
A: M4-style uses a squared post and traditional notch, while HK-style features a circular hood around the aperture for faster alignment and protection.
Q: Are there rear sights that glow in the dark?
A: Yes. Tritium-equipped rear sights provide glowing alignment points without batteries—ideal for low-light shooting.
🔗 Related Categories
🚚 Why Buy From Mounts Plus?
-
✅ 25+ Years Serving Shooters
-
🔒 Secure, Hassle-Free Checkout
-
📞 Expert Support From Real Shooters
-
🇺🇸 Proudly U.S.-Based & Veteran-Owned
🛒 Upgrade Your Accuracy with an AR-15 Rear Sight
Whether you're training at the range or prepping your rifle for serious use, a dependable AR-15 rear sight ensures faster, more accurate target acquisition. Explore our full collection and find the rear sight that completes your build.
👉 Shop now at Mounts Plus – built to perform, ready to ship.