FAB Defense FXFRBS Front/Rear Flip Up Sights Folding Black for AR-15, M4, M16
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FAB Defense
Overview
The FAB Defense FXFRBS Front/Rear Flip Up Sights are a practical addition to your AR-15, M4, or M16 build, offering a lightweight and durable polymer construction. These folding sights provide rapid deployment and can be easily stowed away when not in use, ensuring that you have a reliable sighting solution without adding bulk to your rifle. These sights are commonly found in tactical builds where space and weight considerations are crucial.
Specifications
FAB Defense FXFRBS Front/Rear Flip Up Sights Folding Black for AR-15, M4, M16
Build history on GunPartPicker
Builders on GunPartPicker first added the FAB Defense FXFRBS Front/Rear Flip Up Sights Folding Black for AR-15, M4, M16 to a build in June 2026.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today all 3 retailers we track have it in stock. Prices barely moved in September 2026, holding around $81.97, so there haven't been real sales lately. Buying today, the lowest price is $81.97 at Primary Arms, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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