ARMS #40 L-F/#40 L Combo: The #40 L-F/#40 L Combo from ARMS comes with low-profile front and rear sights that fold flat on top of your AR’s rail. The front sight has protective wings, and the rear sight has dual apertures. When needed, the sights spring up and lock in place via a quick release lever that also ensures the sights are not accidentally deployed.
Command Arms FFS & FRS: When folded, the Command Arms FFS (Flip-up Front Sight) and FRS (Flip-up Rear Sight) are low profile so they will not snag on gear. Made of polymer and steel, these sights bolt onto any Picatinny-style rail using a square lug so they won’t wiggle when they’re mounted. Both sights can also be adjusted without tools, and the FRS features three aperture options and is adjustable for windage. The sights are spring-loaded and deploy rapidly using ambidextrous buttons. Each sight also weighs less than an ounce.
Diamondhead D-45 ISS: The D-45 ISS sights from Diamondhead deploy at a 45-degree offset so a shooter can slightly roll their rifle 45 degrees to use these backup sights in close quarters. In other words, you won’t have to remove an optic or co-witness it with your sights. The rear sight stows under the eyepiece of a scope and features dual apertures with 0.5-MOA adjustments. The front sight accepts all standard A2 front sight posts.
Diamondhead ISS: The sights in the Integrated Sighting System (ISS) feature patented diamond-shaped apertures for faster target acquisitions and centering. These sights are made of metal and bolt onto any Picatinny-style rail. A push button instantly deploys or stows the sights. The ISS is available in black or Flat Dark Earth.
Dueck Defense RTS: Designed by top 3-Gun shooter and IPSC Grand Master Barry Dueck, the Rapid Transition Sights (RTS) are built for the rigor of competition or the abuse of law enforcement/military tactical scenarios. These offset sights enhance a shooter’s ability to quickly hit near and far targets. Made of 7075-T6 aluminum, these sights are durable and mount to your rifle’s top rail without interfering with a mounted optic.
FAB Defense Tritium Flip-Up Sights: These backup sights are made of lightweight yet rugged polymer and stow very flat along a Picatinny top rail when folded. Both sights also feature tritium inserts for quick aiming in any lighting condition. The front sight is adjustable for elevation, and the rear sight is adjustable for windage.
Magpul MBUS Pro LR: The adjustable, all-steel MBUS Pro LR rear sight features an elevation-adjustment wheel to accurately engage targets from 200 to 600 meters in 50-meter increments. No tools are needed to make the adjustments. Positive detents keep the MBUS Pro LR at standard AR sight height when deployed and low profile when stowed.
Magpul MBUS Pro Offset: Magpul’s MBUS Pro Offset front and rear sights deploy to standard AR height at a 45-degree offset on the right-hand side of the weapon. These backup sights can supplement an optic or one that has been damaged beyond use. They will easily mount to any Picatinny-style rail.
Magpul MBUS: Magpul’s front and rear MBUS sights are super lightweight since they are made from injection-molded polymer. The sights are also spring-loaded and flip up by pressing the top from either side. Protective wings shield the spring-locking A2 front sight post, and an elevation-adjustment tool is included with the front sight. The rear sight features dual apertures. MBUS sights are available in black, Flat Dark Earth, stealth gray or olive drab.
Mission First Tactical Sights: The BUPSWF (Backup Polymer Flip-Up Front Sight) and BUPSWR (Backup Polymer Flip-Up Rear Sight) from Mission First Tactical are designed with shrouds that shelter the front post blade and rear aperture from dust and debris as well as damage from impact when in the closed position. These sights are made from though polymer and mount to any Picatinny rail.
Troy 45-Degree Folding Battle Sights: Troy Industries’ durable, practical 45-Degree Folding Battle Sights position the aperture at a mil-spec height and deploy effortlessly. The front sight is an HK-style unit with rounded protective wings.
Troy Folding Battle Sights: Troy offers a number of sighting optics, including its Medium Battle Sight Set, which includes a folding front sight and a folding Di-Optic Aperture (DOA) rear sight, which are made with aluminum and steel components. The rear sight’s diamond-shaped apertures—for 300- and 500-meter engagements—center your eye for faster target acquisitions.
UTG Low-Profile Flip-Up Sights: UTG’s new Low-Profile Flip-Up front and rear sights are made of tough, lightweight aluminum. Just press the spring-loaded side releases to deploy these sights or fold them down when not in use. Both sights are hardcoat anodized matte black.
XS Sight Systems XTI Set: The AR-16/M16 Xpress Threat Interdiction (XTI) sights are fixed offset sights that employ a big dot on the front sight and a shallow V-shaped rear sight with a vertical post. The dot and post use tritium so they are visible in low-light conditions. These sights attach to any rail.
XS Troy Battle Sights: XS Sight Systems offers upgraded Troy Folding Battle Sight sets where the front sight uses a tritium stripe that glows in low-light conditions. The rear sight features the CSAT aperture, which was pioneered by master shooter Paul Howe.
YHM Front Flip Sight Tower: A combination flip-up front sight and gas block, the YHM-9394 Front Flip Sight Tower has a built-in gas block. The two-piece design allows it to be mounted on firearms with pinned and welded muzzle accessories.
YHM QDS Same-Plane Sights: The QDS Same-Plane sights from Yankee Hill Machine (YHM) flip up or stow with the press of a button. Made of aluminum with a black anodized finish, the QDS rear sight is adjustable for windage while the front sight is adjustable for elevation.
Optics fail. That’s why you need to make sure your rifle has Plan B—backup sights for quick aiming. Sometimes called backup iron sights, or BUIS, these are go-to targeting aids for when your glass fails or become inoperable. Backup sights are also handy at close range, where a high-magnification optic is unusable.
BUIS allow an operator to stay in the fight, and they’re typically designed to be deployed in an instant if needed. Here are some great secondary options to help you stay in the fight.
