Fab Defe

Fab Defense FX-FBS Front Back-Up Sight AR-15/M4/M16 Black Folding

Gun Parts

UPC 07290105942005

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1 offer · 1 in stock · sorted by best price

Retailer	Price	Stock	Last checked	Deal
East Valley Tactical	$36.80	In stock (20)	21m ago	Go to deal

Prices and stock are from each retailer's latest check and can change. Price Dope may earn a commission from retailer links. Disclosure

Description

FBS is an advanced, low-profile, durable, auxiliary front sight. It can be used with any rear sight, but has been designed to provide an extreme optical advantage. Its sight pin elevation is easily and quickly adjusted without tools. The FBS is readily mounted on any 1913 Picatinny rail, making it ideal for use on M4 / AR-15 / M-16 platforms. The sight can be used as a primary or back-up sight and the ergonomic angel-wing-shaped front shroud helps center the image with any rear sight. The low folded profile is smooth and inconspicuous, and will not snag on gear, webbing, or brush. The sight is also made of extremely durable high-grade polymer and metal, and has an instant spring-locked deployment mechanism that will not slip, break or deform. This model has a black finish.

Specs

Brand	Fab Defense (usiq)
Category	Parts · Parts
UPC	07290105942005
Weight	0.88 oz
Type	Sight
Model	Front Back-Up Sight
Style	Folding
Mount_type	Picatinny Rail

Description	Front Only
Finishcolor	Black
Firearm_fit	M4
Frame_color	Black
Front_color	Black
Firearm_type	Rifle
Similar_items	Sight
Frame_material	Polymer/Metal

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D.O.P.E.Price history

Lowest price across connected retailers, from every price check we've recorded.

Current best: $36.80
Low: $36.80
High: $36.80
Tracking since: Oct 8, 2026

One price check so far ($36.80 on Oct 8, 2026). The chart fills in as retailers are re-checked.

Recent price checks (1)

Date	Retailer	Price	Stock
Oct 8, 2026, 5:15 PM PT	East Valley Tactical	$36.80	In stock

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