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FAB Defense built this front and rear set for the shooter who runs a red dot or scope but wants iron sights ready to go if the optic ever quits. Both units fold down into a slim, snag-free profile that tucks under your optic, then flip up by hand when you need them. They're molded from high-grade polymer with metal reinforcement, which is why the pair stays impressively light while still holding a solid zero.
The rear sight uses a dual aperture design borrowed from the M16 lineage, giving you a 3mm hole for low light and quick target acquisition and a tighter 1.5mm hole for more precise work at distance. Flipping between them takes a second and matches your eye relief or lighting on the fly. Up front, the angel-wing shroud protects the sight post and helps center your eye, and when it lines up with the matching rear it forms a natural optical tunnel that gets you on target faster.
Both sights lock onto any 1913 Picatinny rail and work as either your primary irons or a true backup. Windage and elevation adjust by hand with a positive detent, so there's no fumbling for an Allen key at the range. Worth noting: the front sight is meant for a solid rail, not a railed gas block, so plan your mounting spots accordingly. These deploy manually rather than popping up with a button, and users tend to appreciate that quiet, deliberate action since there's no spring-loaded mechanism to wear out or fire off at the wrong moment.
For anyone building out a budget-friendly AR or just wanting insurance behind their glass, this set covers the basics without adding real weight to your rifle. It's a practical, no-drama option that installs in minutes and gets out of the way until you need it.
No, these deploy manually. You flip each sight up into position by hand and it's held upright by a strong spring detent. There's no push-button release, which means no spring or button to wear out over time, and the beveled shape lets you raise them with just your thumb.
Either works. The set is designed to serve as a reliable backup behind a red dot or scope, but plenty of folks run them as primary irons on a budget build. The dual-aperture rear and angel-wing front give you a genuine sight picture, not just an emergency option.
The rear sight has two selectable apertures. The larger 3mm opening is better for low light and fast target acquisition at closer range, while the smaller 1.5mm hole tightens things up for more precise shots at distance. You switch between them instantly by flipping the aperture as conditions change.
Yes, both the front and rear clamp onto any standard 1913 Picatinny rail. One thing to keep in mind is that the front sight is designed for a solid rail section and should not be mounted on a railed gas block. Plan your positioning so the front and rear sit on the same plane for a proper sight picture.
| UPC | 7290105943378 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | FXFRBS |
| Shipping Weight | 0.225 |
| Style | Folding Back-Up Sights |
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