45 Degree Iron Sights | Offset BUIS & Backup AR-15 Sights

Q: What are 45 degree iron sights used for?

45 degree iron sights act as backup sights for rifles with optics. Mounted at a 45 degree angle, they let you quickly switch to irons if your optic fails.

Q: Are 45 degree sights good with a red dot?

Yes. 45 degree offset sights are ideal for use with magnified optics or red dots, allowing shooters to quickly transition to backup iron sights.

Q: What’s the difference between flip-up and fixed offset BUIS?

Flip-up 45 degree BUIS fold down for a cleaner profile and deploy only when needed, while fixed offset sights remain ready at all times and are generally more rugged.

Q: Do 45 degree sights fit all AR-15 rifles?

Most 45 degree offset BUIS mount to any standard Picatinny rail, making them compatible with AR-15 rifles and other modern sporting platforms.

Q: Are 45 degree backup sights accurate?

Yes. With proper installation and zeroing, 45 degree iron sights are accurate and dependable for close to mid-range shooting.

45 Degree Iron Sights | Offset BUIS & Backup AR-15 Sights

45 Degree Flip Up Buis

**Dueck Defense RTS Front & Rear Rapid Transition 45 Degree Iron Sights** $219.95

**Magpul MBUS Pro Offset Sight Rear** $104.45

**Magpul MBUS Pro Offset Sight Front** $85.45

**UTG ACCU-SYNC MT-745 | Offset Front Flip-up BUIS for AR-15** $44.93

**UTG ACCU-SYNC MT-945 | Offset Rear Flip-up BUIS for AR-15** $44.93

**GG&G AR-15 45 Degree Iron Sights** $128.87

**Strike Industries Sidewinder II - Black Offset & Inline BUIS** $176.95

**TROY 45° Offset BattleSight Set | Black – HK Front & Round Rear** $274.86

**TROY 45° Offset BattleSight Set | FDE (Flat Dark Earth) – HK Front & Round Rear** $274.86

**TROY 45° Offset BattleSight Set | Black – M4 Front & Dioptic Rear** $274.86

When running optics on your AR-15, it’s essential to have a reliable backup system in case your red dot or scope goes down. That’s where 45 Degree Iron Sights—also known as offset BUIS (Backup Iron Sights)—come in. These sights mount at an angle on your Picatinny rail, allowing you to quickly cant your rifle and transition from optics to iron sights in seconds.

At Mounts Plus, we carry a wide selection of 45 degree offset sights designed for AR-15 rifles and tactical carbines. Whether you need flip-up offset BUIS, fixed low-profile designs, or QD-compatible models, our collection covers everything from affordable options to premium tactical-grade sights.

Why Choose 45 Degree Offset Iron Sights?

Instant Backup: Quickly transition to irons without removing your optic.
Perfect with Optics: Run a red dot or scope and still keep iron sights ready.
Fast Target Acquisition: Just tilt the rifle and get on target fast.
Flip-Up or Fixed: Choose between compact folding BUIS or always-ready fixed sights.
Universal Fit: Compatible with most AR-15 and modern sporting rifles.

Top Features to Look For in 45 Degree BUIS

Flip-Up 45 Degree Sights: Compact and only deploy when you need them.
Durable Construction: Options in steel, aluminum, and reinforced polymer.
Adjustable or Fixed Zero: Tool-less windage and elevation on premium models.
Low-Profile Design: Sits flat against your rail until deployed.
Matte Black Finish: Matches most AR-15 builds for a tactical look.

Mounts Plus Selection of 45 Degree Iron Sights

We offer offset BUIS from leading brands like Strike Industries, Magpul, Troy, UTG, and more. Whether you’re setting up a competition rifle, a tactical carbine, or a range-ready AR-15, you’ll find the best 45 degree backup sights right here.

✅ Frequently Asked Questions (FAQ)

Q: What are 45 degree iron sights used for?
A: They serve as backup sights for rifles with optics. Mounted at a 45° angle, they let you quickly switch to irons if your red dot or scope fails.

Q: Are 45 degree sights good with a red dot?
A: Yes. They’re especially useful with magnified optics or LPVOs, giving you fast access to irons without removing your primary optic.

Q: What’s the difference between flip-up and fixed offset BUIS?
A: Flip-up sights fold down for a cleaner profile and only deploy when needed, while fixed offset sights are always ready and slightly more rugged.

Q: Do 45 degree sights fit all AR-15 rifles?
A: Most offset BUIS mount to any standard Picatinny rail, making them widely compatible with AR-15 platforms and other modern sporting rifles.

Q: Are 45 degree backup sights accurate?
A: Yes. With proper zeroing, 45 degree iron sights are accurate and dependable for close to mid-range shooting.

🔗 Shop 45 Degree Iron Sights at Mounts Plus

Upgrade your AR-15 with the best 45 Degree Iron Sights available. From flip-up offset BUIS to rugged fixed backup sights, Mounts Plus has the perfect solution for shooters who demand speed, reliability, and versatility. Shop now and keep your rifle prepared for anything.