UTG AR15 Low Profile Flip-Up Rear Sight with Dual Aiming Ape Black

The UTG AR15 low profile flip-up rear sight with dual aiming aperture is a no-frills backup or primary iron sight option built for shooters running AR platforms equipped with Picatinny rails. If you're setting up a modern rifle or need a lightweight, collapsible rear sight that stays out of the way when running an optic and deploys fast when you need it, this sight delivers functional accuracy without the premium price tag.

Built from aircraft-grade aluminum, the sight is engineered to handle hard use. The spring-loaded Posi-lock mechanism with side plunger release lets you flip and fold the sight smoothly, and the design locks down tight with spring-activated ball bearings to maintain zero retention once set. The dual aiming aperture is the real workhorse here—it gives you flexibility for different lighting conditions and sight pictures, whether you're shooting in full sun, moving targets in dynamic drills, or working through limited visibility scenarios where a tighter sight picture helps.

Installation is straightforward on any AR-compatible Picatinny rail system. The low profile design and slim footprint mean it won't bulk up your rifle or snag on your gear when shouldered or holstered. The 3mm locking bolt and mounting deck are solid contact points, and once you've dialed it in, the Posi-lock plunger keeps that zero locked down. This is the kind of sight that works best alongside quality iron sight training—it's not magic, but it's reliable, compact, and built to last.

Key Features

• Aircraft-grade aluminum construction for durability and lightweight performance
• Dual aiming aperture for flexibility across lighting and engagement scenarios
• Spring-loaded Posi-lock design with side plunger for quick flip-up and fold-down action
• Spring-activated ball bearings maintain zero retention under recoil
• Super slim, low-profile footprint won't block optics or add bulk
• Compatible with Picatinny rail systems on AR-15 and other tactical rifles

Specifications

Frequently Asked Questions

Will this flip-up rear sight work with my AR-15 with an optic mounted?

Yes. The low-profile design is specifically engineered to sit low on the rail when folded, so it won't interfere with optics mounted in front of or on top of it. It's a backup sight that gets out of the way when you're running a scope or red dot.

What's the difference between the two aiming apertures?

The dual aiming aperture gives you two sight picture options. This flexibility is useful when switching between different lighting conditions or target distances—one aperture may give you a tighter sight picture in bright daylight, while the other works better in lower light or for faster target acquisition on moving targets.

How tight does the Posi-lock hold zero?

The spring-loaded Posi-lock plunger combined with spring-activated ball bearings is designed to retain zero under normal shooting and recoil. Once you've set and locked the sight, it stays put, but like all mechanical sights, you should verify your zero periodically, especially after transport or storage.

Is this sight compatible with all AR platforms?

It's compatible with any AR-platform rifle or long gun equipped with a Picatinny rail. That includes standard AR-15s and most modern tactical rifle systems with rail-mounted sighting systems.