What’s your backup plan? Backup iron sights (BUIS) allow you to stay in the fight should your primary optic fail. Most backup sights today are designed to be deployed instantly via the press of a button, locking into position. Along with being a redundant sighting system in the event your glass fails, backup sights are also ideal for close-range engagements where a high-magnification optic might be a liability. So, without further ado, here are a few failsafe backup iron sights for AR shooters.

For more information about the backup iron sights featured in the gallery above, visit the following sites.

ARMS #40 L-F/#40 L Combo

AT Flip Up Combo

Blackhawk Folding Sights

Command Arms FFS & FRS

Diamondhead D-45 ISS

Diamondhead ISS

Dueck Defense RTS

FAB Defense Tritium Flip-Up Sights

GG&G 45 Degree Transition Sights

Guntec Thin Profile BUIS Sight Set

Magpul MBUS

Magpul MBUS Pro LR

Magpul MBUS Pro Offset

Mission First Tactical Sights

Promag AR-15/M16 Flip Ups

Troy 45-Degree Folding Battle Sights

Troy Folding Battle Sights

UTG Low-Profile Flip-Up Sights

XS Sight Systems XTI Set

XS Troy Battle Sights

YHM Front Flip Sight Tower

YHM QDS Same-Plane Sights

This article was originally published in “Black Guns” 2018. To order a copy, visit

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