Radian Vertex Trigger - AR-15 Single-Stage - Flat Bow
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Drop-in fit for AR-15/M4 pattern lower receivers with mil-spec trigger pins. Confirm pin size before ordering.
Not sure it fits your rifle? Ask us before you order
The Radian Vertex Flat is a single-stage drop-in trigger for AR-15 and M4 rifles, fitting lower receivers with standard Mil-Spec trigger pins.
A single-stage trigger from the company that machines some of the AR world's finest controls — the Vertex, flat bow edition.
The Radian Vertex (ACC-0017) is a single-stage match trigger with a 3.5–4 lb (1.6–1.8 kg) pull built to Radian Weapons' obsessive machining standards — the same standards behind the Raptor charging handle. The break is clean and consistent with minimal take-up and a short, positive reset, and the flat trigger shoe adds leverage while indexing your finger identically on every press.
Radian Weapons' tolerances mean the Vertex feels hand-fitted out of the box and stays that way: no grit developing, no pull-weight drift, no surprises. For duty-capable precision in a single-stage, it belongs on the very short list.
Drops into AR-15/M4-pattern lower receivers using standard Mil-Spec trigger pins, with no extra hardware required if your existing pins are serviceable. Large-pin receivers will not take it, so confirm your pin size before ordering — if the lower is an unusual make, contact us with the details and we will check. Fitting is an armourer-level job: complete full function and safety checks before live fire.
| Platform | AR-15 / M4 |
|---|---|
| Fits | AR-15/M4 lower receiver, standard Mil-Spec trigger pins |
| Type | Single-stage trigger, flat bow |
| Finish | Black |
| Pull weight | 3.5–4 lb (1.6–1.8 kg) |
| Made in | USA |
| Brand | Radian Weapons |
| MPN | ACC-0017 |
Radian precision, at the trigger. Order the Vertex Flat 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: all Rifle Triggers, AR-15 Parts & Accessories or browse all Radian Weapons.
| Platform | AR-15 / M4 |
|---|---|
| Fits | AR-15/M4 lower receiver, standard Mil-Spec trigger pins |
| Type | Single-stage trigger, flat bow |
| Finish | Black |
| Pull weight | 3.5–4 lb (1.6–1.8 kg) |
| Made in | USA |
| Brand | Radian Weapons |
| MPN | ACC-0017 |
| Category | Trigger |
| Shipping weight | 0.907 kg |
| Barcode | 817093027414 |
£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.
Yes, it is a drop-in single-stage for AR-15/M4 pattern lower receivers with mil-spec trigger pins. Large-pin receivers will not take it, so confirm your pin size before ordering. If the lower is an unusual make, <a href="/pages/contact">contact us</a> with the details and we'll check.
It is a single-stage trigger with a pull weight of 3.5 to 4 lb (1.6–1.8 kg), so there is no take-up stage to manage and the shot breaks in one motion. That weight range is a practical middle ground: light enough for accurate work but not so light that it feels nervous on a general-purpose rifle. The pull is set rather than user-adjustable.
A flat shoe places your finger at the same distance from the pivot regardless of how high or low you contact it, which keeps the felt weight consistent shot to shot. It also gives a slightly straighter rearward press. If you prefer the familiar feel of a traditional trigger, the <a href="/products/radian-vertex-trigger-curved">curved Vertex</a> is mechanically the same unit with a curved shoe.
It comes in a black finish as a single configuration, so the only real choice is flat versus curved. It installs with your existing standard trigger and hammer pins, so no extra hardware is required if they are serviceable. The rest of the <a href="/collections/radian-weapons">Radian Weapons</a> range includes matching charging handles and selectors if you are building out the rifle.
Triggers go from the United Kingdom with £5 tracked UK delivery in 7–10 business days and a tracking email at despatch. If it turns out to be the wrong fit for your receiver, 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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