Timney Impact AR Trigger - AR-15 Drop-In - Straight Shoe
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. Self-contained unit — confirm trigger pin size before ordering.
Not sure it fits your rifle? Ask us before you order
The Timney Impact AR-ST is a self-contained single-stage drop-in trigger with a straight shoe for AR-15 and M4 pattern rifles.
The value drop-in with a modern edge — Timney's Impact AR straight-shoe puts flat-trigger feel within everyone's reach.
The Timney Impact AR-ST pairs the Impact line's clean single-stage break with a straight trigger shoe — the modern profile that encourages a lower finger position, adds leverage and promotes a straight-to-the-rear press. Housed in a fully self-contained drop-in module, it installs in minutes and delivers exactly the pull Timney's technicians tested before boxing it.
For builders who want the flat-shoe experience without flagship pricing, the Impact AR-ST is the honest answer: real Timney internals, real quality control, and a break that makes factory triggers feel agricultural.
Drops into AR-15/M4 pattern lower receivers using the existing pin holes, which includes UK straight-pull AR-15 builds — the straight shoe and low finger position suit the deliberate, aimed shooting a straight pull is used for. The unit is self-contained, so confirm your trigger pin size before ordering. Complete function checks before live fire.
| Platform | AR-15 / M4 |
|---|---|
| Fits | Standard AR-15 / M4 lower receivers, existing pin holes |
| Type | Single-stage drop-in trigger, straight shoe |
| Finish | Black |
| Made in | USA |
| Brand | Timney Triggers |
| MPN | IMPACT-AR-ST |
Flat-shoe feel, entry price. Order the Impact AR-ST 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 Timney Triggers.
| Platform | AR-15 / M4 |
|---|---|
| Fits | Standard AR-15 / M4 lower receivers, existing pin holes |
| Type | Single-stage drop-in trigger, straight shoe |
| Finish | Black |
| Made in | USA |
| Brand | Timney Triggers |
| MPN | IMPACT-AR-ST |
| Category | Trigger |
| Shipping weight | 0.2 kg |
| Barcode | 081950467174 |
£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 AR-15/M4 pattern lower receivers as a self-contained unit. The pin size is the detail to confirm first, since both small and large pin lowers are in circulation. Check your receiver's specification, or contact us with the make and model and we'll help you work it out.
A straight, flat-faced bow keeps your finger meeting the trigger in the same place whatever the depth of your grip, which some shooters find makes the break more repeatable. It also tends to feel slightly lighter than a curved shoe at the same measured weight, because your finger sits lower on the bow. The mechanism itself is identical to the <a href="/products/timney-impact-ar-trigger-curved">curved shoe Impact</a>.
The Impact is the entry point in Timney's AR line: a single-stage drop-in cassette in black, made in the USA, without the competition-grade pull weights of the AR PRO or the Competition series. For a rifle used at the range and in general shooting it is a straightforward improvement on a standard trigger group. If you want a two-stage feel instead, look at the Targa or AR PRO.
The unit uses your existing trigger and hammer pins, so nothing else has to be bought. Fitting is ordinary trigger group replacement, and it should always be followed by a proper function check. If the rifle behaves oddly afterwards, stop and have it inspected.
This trigger is shipped from the United Kingdom with £5 tracked UK delivery in 7–10 business days, and tracking arrives by email when it goes out. If it isn't right for your lower, 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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