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 crude.
Key Features
- Straight trigger shoe — modern feel, better leverage
- Clean single-stage break — consistent shot after shot
- Self-contained drop-in module — minutes to fit
- Timney factory quality — the 1946 standard at a value price
Compatibility & Fitment
Drops into AR-15/M4 pattern lower receivers using the existing pin holes. The unit is self-contained, so confirm your trigger pin size before ordering. Complete function checks before live fire.
Technical Specifications
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 |
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 IMPACT-AR-ST fit my rifle?
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.
What does the straight shoe change about the way it feels?
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 curved shoe Impact.
How does the Impact compare with Timney's pricier AR triggers?
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.
Do I need extra parts or tools?
The unit uses your existing trigger and hammer pins, so nothing else has to be bought. Installation is ordinary trigger group replacement, and it should always be followed by a proper function check. If the rifle behaves oddly afterward, stop and have it inspected.
