Radian Vertex FBX Single-Stage Trigger for AR-15
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Fits any Mil-Spec AR-15 lower with standard 0.154in trigger pins. Self-contained cassette.
Not sure it fits your rifle? Ask us before you order
The Radian Vertex FBX is a flat-bow single-stage drop-in trigger for AR-15 rifles, fitting any Mil-Spec lower with standard .154 in trigger pins.
Radian's current-generation Vertex, flat-bow — a precision-machined single-stage drop-in with a crisp break and a flat shoe for consistent finger placement.
The Radian Vertex FBX is the flat-bow (FBX) version of Radian Weapons' current Vertex single-stage trigger. The flat trigger shoe gives a consistent finger contact point and the feel of a lighter pull, over a self-contained drop-in cassette that delivers a clean wall, a crisp break and a fast, positive reset.
Drops into any Mil-Spec AR-15 lower receiver with standard .154 in trigger pins. The unit is a self-contained cassette, so there are no separate springs to fit and pins are supplied. Large-pin receivers will not take it, so confirm your pin size before ordering. Complete a full function and safety check before live fire. If you prefer a curved shoe, the Vertex CBX is the same trigger with a curved bow.
| Platform | AR-15 |
|---|---|
| Fits | Mil-Spec AR-15 lower, standard .154 in trigger pins |
| Type | Single-stage drop-in trigger, flat bow (FBX) |
| Finish | Black |
| Made in | USA |
| Brand | Radian Weapons |
| MPN | R0928 |
Flat shoe, consistent press. Order the Vertex FBX today — imported from the USA with all duties paid by us and dispatched tracked from the UK in 7–10 business days, with nothing to pay on delivery.
Explore more: AR-15 Triggers or browse all Radian Weapons.
| Platform | AR-15 |
|---|---|
| Fits | Mil-Spec AR-15 lower, standard .154 in trigger pins |
| Type | Single-stage drop-in trigger, flat bow (FBX) |
| Finish | Black |
| Made in | USA |
| Brand | Radian Weapons |
| MPN | R0928 |
| Category | Trigger |
| Shipping weight | 0.1 kg |
| Barcode | 810098421171 |
£5 tracked UK delivery on every order via Royal Mail Tracked 24. Our products are ordered in from the manufacturer rather than held in UK stock, so please allow 7 to 10 business days (Monday to Friday, excluding bank holidays) from the date of your order for it to reach you. Tracking details are emailed on dispatch. UK delivery only.
You have 30 days from receiving your order to cancel it for any reason, then 14 days to send it back unused and in its original packaging. Faulty, damaged or incorrect items are replaced or refunded and we cover reasonable return postage. Refunds go back to your original payment method within 14 days of receiving the return.
It drops into any Mil-Spec AR-15 lower receiver with standard .154 in trigger pins. Large-pin receivers will not take it, so confirm your pin size before ordering — if you cannot tell from the paperwork, measure the pin holes or ask us with the make and model to hand. The unit arrives as a self-contained cassette with pins supplied.
A flat shoe places your finger at the same distance from the pivot however high or low you contact it, so the felt weight stays consistent shot to shot and the press is straighter to the rear. That extra leverage at the bottom of the shoe is why a flat trigger often feels lighter than a curved one of the same weight. Behind the shoe it is the same self-contained cassette, with a clean wall and a fast, positive reset.
Mechanically the FBX and the <a href="/products/radian-vertex-cbx-single-stage-trigger-ar-15">curved-bow CBX</a> are the same trigger, and the choice is about where your finger sits. Shooters with larger hands, and anyone who wants identical leverage wherever they press, usually get on better with the flat; the curved shoe is the more familiar feel if you have come off a standard Mil-Spec trigger. Compare the alternatives in <a href="/collections/ar-15-triggers">AR-15 triggers</a>, or see how the brands stack up in our <a href="/blogs/buying-guides/best-ar-trigger-brands-compared">trigger brands compared</a> guide.
The install is quick because the cassette goes in as one piece and the pins are supplied, but this is armourer-level work on the fire-control group rather than a bolt-on accessory. If you have not done it before, have a gunsmith fit it. Either way, complete a full function and safety check before live fire.
Triggers are sent from the United Kingdom with £5 tracked UK delivery in 7–10 business days, and you’ll get tracking by email when it ships. If a part turns out to be the wrong fit, see our returns policy or <a href="/pages/contact">contact us</a> and we’ll help sort it.
7 to 10 business days from the date of your order. Every order is sent Royal Mail Tracked for a flat £5 and you receive tracking details by email when it is dispatched.
Yes. We list only genuine parts and optics from the brands shown, ordered in from the manufacturer for your order.
Compatibility notes on this page come from the manufacturer. If you are unsure, email us with your make and model before ordering and we will check rather than guess.
Yes. Bundle & Save applies automatically in your basket: 5% off when you buy 2 items, 10% off at 3 items and 15% off at 4 or more. It works across the whole range, so you can mix and match, and there is no code to enter.
Yes — you have 30 days from delivery to cancel for any reason, as long as the item is unused and in its original packaging. See our returns policy for the details.
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