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.
How It Compares
Compare with the Radian Vertex CBX Single-Stage Trigger for AR-15.
Key Features
- Precision single-stage break — crisp and consistent
- Flat bow — consistent finger placement, lighter feel
- Self-contained drop-in cassette — fast, clean install
- Fast positive reset — control at speed
Compatibility & Fitment
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.
What's Included
- Radian Vertex FBX drop-in trigger cassette with pins
Technical Specifications
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 |
US Shipping & Support
Shipped from D&R Sports Center in the USA with fast, tracked delivery. Questions on fit, mounting or which model suits your setup? Our team is glad to help before and after your purchase.
Frequently Asked Questions
Will the Vertex FBX fit my lower?
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. The unit arrives as a self-contained cassette with pins supplied.
What does the flat bow do for the pull?
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.
Should I take the flat bow or the curved?
Mechanically the FBX and the curved-bow CBX 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 prefer the flat; the curved shoe is the more familiar feel if you have come off a standard Mil-Spec trigger.
Is installation straightforward?
The install is quick because the cassette goes in as one piece and the pins are supplied, but this is armorer-level work on the fire-control group rather than a bolt-on accessory. If you have not done it before, have a gunsmith install it. Either way, complete a full function and safety check before live fire.
