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AT3 Tactical Flip Up Backup Iron Sights (BUIS) - Front & Rear Set - Same Plane or Gas Block Height

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You will receive fast, free shipping for all orders over $35

Shipping cost is $5.50 for orders under $35. We ship with UPS and USPS. 

Most orders ship out within 24 hours

You will receive tracking information immediately at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses.  

We have a 90-day no-hassle return policy. We pay return shipping.

If you need to request a return, contact us at and we will send you a return label

After 90 days, defective items will still be covered under the manufacturer’s warranty, where applicable.

Please refer to the product listing for warranty details. If you have specific warranty questions, contact us at We may direct you to pursue your warranty claim directly with the manufacturer.

Your satisfaction is our #1 priority

If you're dissatisfied with your purchase, in any way, please contact us at - we will do our best to make it right.

Product Options

AT3 Tactical Flip Up Backup Iron Sights (BUIS) provide dead-on accuracy, superior durability, and the best value for AR-15 iron sights!
Available in 2 types:

Gas Block Sights - for mounting on gas blocks that are lower than the upper receiver (usually about 1/4" lower than the upper receiver rail)

Same Plane Sights Made for mounting on quad rails or other rails at the same height as the upper receiver

  • A2 style sights - adjustable front sight post height, and dual aperture rear sight with windage adjustment
  • Easy to install and sight in. Reliable and accurate.
  • Optional - Save $3.95 when you add a Front Sight Adjustment Tool for only $8. This tool makes it a breeze to zero your sights!
  • Also check out our 45 Degree Offset Iron Sights - great for rapid transition between short and long range targets!
  • Material: 6061 aircraft aluminum
  • Finish: Hardcoat Anodized (black)
  • Weight:
    • Gas Block Sights: 3.3oz (Rear) & 3.0oz (Front)
    • Same Plane Sights: 3.3oz (Rear) & 2.6oz (Front)
  • Packaging: PE Bag
  • Mounts to: Picatinny rail
  • Height when flipped down: .75" (front), 1" (rear)

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