TriggerTech Diamond Single-Stage Trigger - AR-15 - Flat 1.5-4 lb - Blue/Black
Mix and match across the range: 2 items save 5%, 3 save 10%, 4 or more save 15% on your whole basket.
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 TriggerTech Diamond is an externally adjustable single-stage drop-in trigger with a flat shoe for AR-15 and M4 pattern rifles.
The trigger that took on creep — TriggerTech's Diamond puts a frictionless 1.5–4 lb (0.7–1.8 kg) break in your AR-15.
The TriggerTech Diamond AR (flat) is built on Frictionless Release Technology: a patented free-rolling component between sear and trigger that removes the sliding friction a conventional trigger drags through. TriggerTech credits it for a break with no perceptible creep — the wall is the shot — plus an ultra-short, tactile reset and a pull that feels lighter than its gauge weight. The Diamond adds precise external adjustability from 1.5 to 4 lb (0.7–1.8 kg) without removing the trigger from the lower.
Stainless internals in a sealed housing keep the mechanism consistent through dust and rain. The flat shoe indexes your finger identically every press — a pairing precision AR-15 shooters have made a fixture on the line.
Drop-in fit for AR-15/M4 pattern lower receivers using standard Mil-Spec trigger pins, which includes UK straight-pull AR-15 builds — with a range from 1.5 lb (680 g) up to 4 lb (1.8 kg) this is one of the few triggers that covers a light bench setting and a practical field setting on the same rifle. Confirm your pin size before ordering. Function-check the rifle before live fire.
| Platform | AR-15 / M4 |
|---|---|
| Fits | Mil-Spec AR-15 / M4 lower receivers, standard trigger pins |
| Type | Single-stage trigger, Frictionless Release, flat shoe |
| Material | Sealed stainless internals |
| Finish | Blue/Black |
| Pull weight | Adjustable 1.5–4.0 lb (0.7–1.8 kg) |
| Made in | North America |
| Brand | TriggerTech |
| MPN | AR0-SAB-14-NNF |
Feel what frictionless means. Order the Diamond AR 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 TriggerTech.
| Platform | AR-15 / M4 |
|---|---|
| Fits | Mil-Spec AR-15 / M4 lower receivers, standard trigger pins |
| Type | Single-stage trigger, Frictionless Release, flat shoe |
| Material | Sealed stainless internals |
| Finish | Blue/Black |
| Pull weight | Adjustable 1.5–4.0 lb (0.7–1.8 kg) |
| Made in | North America |
| Brand | TriggerTech |
| MPN | AR0-SAB-14-NNF |
| Category | Trigger |
| Shipping weight | 0.1 kg |
| Barcode | 885768003346 |
£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 is a drop-in unit for AR-15 and M4 pattern lowers with mil-spec trigger pins, fitted as one sealed cassette. Confirm your receiver's pin size before ordering. No permanent alteration to the lower is involved.
The Diamond is the precision end of the line, with tool-less adjustment from 1.5 to 4 lb (0.7–1.8 kg) — a lighter window than the Adaptable models offer. That takes it into genuine match territory while still allowing a sensible working weight if you want one. It uses the same frictionless roller sear as the rest of the range, so the break is free of creep at any setting.
You change the weight on the unit itself without stripping it down or fishing for hex keys, which makes it practical to try a couple of settings at the range rather than committing at the bench. After any change, run a full function check before shooting. If you settle on the lightest end of the range, treat the rifle accordingly.
This is the flat-shoe version, which gives a consistent contact point and a slightly straighter rearward press — the usual choice for precision and competition. The <a href="/products/triggertech-diamond-pro-single-stage-curved-ar-15">Diamond Pro curved</a> is the same trigger with a curved shoe if you prefer a traditional AR feel. Both are covered alongside the alternatives in our <a href="/blogs/buying-guides/ar-15-trigger-guide">AR-15 trigger guide</a>.
This one is dispatched 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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