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AR-15 Flip-Up Sights – Best Backup Sights for Tactical Builds
AR-15 Flip-Up Sights – Durable BUIS for Tactical, Range & Backup Use
Whether you're building a new rifle, upgrading your optic system, or adding a backup solution, AR-15 flip-up sights are an essential part of a reliable setup. At Mounts Plus, we carry a wide variety of rugged, low-profile, and combat-tested flip-up front and rear sights—perfect for co-witnessing with red dots or running as standalone iron sights.
These sights are designed for fast deployment, repeatable accuracy, and compatibility with all Picatinny rail systems.
🔧 Why Choose Flip-Up Sights for Your AR-15?
Flip-up sights (also known as BUIS – Back-Up Iron Sights) give you the best of both worlds: optics-ready convenience with the reliability of traditional iron sights.
Key Benefits:
- Fast deployment with spring-loaded or manual flip mechanisms
- Slim profile when folded down, ideal for red dot or scope setups
- Always ready as a backup if your primary optic fails
- Lightweight and durable for any mission or environment
- Compatible with all AR-style rifles and flat-top receivers
🛒 Best AR-15 Flip-Up Sights Available Now
| Product | Type | Mount Type | Material | Price |
|---|---|---|---|---|
| Magpul MBUS Gen 2 Sight Set | Front & Rear | Picatinny | Polymer | $84.95 |
| Troy Industries Folding Sights | Front & Rear | Picatinny | Steel | $189.00 |
| Samson Manual Flip-Up Sight | Front Only | Picatinny | Aluminum | $63.45 |
| UTG Super Slim Flip-Up Rear Sight | Rear Only | Picatinny | Steel/Aluminum | $36.95 |
| A.R.M.S. #71L Folding Sights | Front & Rear | Picatinny | Polymer | $79.00 |
Need help choosing? Scroll down to our Buying Guide or contact our support team.
🧠 AR-15 Flip-Up Sight Buying Guide
Not sure which flip-up sights are right for your build? Here’s what to look for:
✔ Mounting System
- Picatinny rail compatible – Standard for most AR-15s
- Ensure sights mount at the same height for proper zeroing
✔ Material
- Polymer – Lightweight and affordable (e.g. Magpul MBUS)
- Aluminum or steel – Rugged, duty-grade performance
✔ Front vs. Rear Only
- Buy individually or as matched front/rear sets
- Match height and brand for optimal alignment
✔ Spring-Loaded vs. Manual
- Spring-loaded sights pop up instantly
- Manual flip sights fold more securely for storage
❓ Frequently Asked Questions
Q: Can flip-up sights be used with a red dot optic?
A: Yes, flip-up sights work well as co-witness backups with red dots. Choose absolute or lower 1/3 co-witness height as needed.
Q: What is the best height for flip-up sights?
A: Most are designed for same-plane rail heights. Be sure both front and rear mount on the same level surface for proper zero.
Q: Do I need a front sight post if I’m running a red dot?
A: Not necessarily—but many shooters keep flip-up sights as a backup. They're essential if your optic fails or battery dies.
Q: What if I have a low-profile gas block?
A: Use rail-mounted flip-up sights placed on the handguard, not the gas block itself, unless it's railed and level.
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🛡️ Why Mounts Plus for AR-15 Flip-Up Sights?
- ✅ Trusted brands like Magpul, Troy, A.R.M.S., Samson
- ✅ Expert customer support to match the right sight to your build
- ✅ Competitive pricing, fast shipping, and easy returns
- ✅ Military, law enforcement, and civilian shooters trust our gear
🚀 Shop AR-15 Flip-Up Sights Now
Whether you’re adding a reliable backup to your optic, building out your first rifle, or upgrading to pro-grade irons, Mounts Plus has the AR-15 flip-up sights to match your needs. Built to last. Ready when you need them.
Order today and equip your rifle with sights you can trust.