Uronen Precision Modular Trigger Group for AR-15

Heads up all AR-15 competition shooters! The Uronen Precision Modular Trigger Group has been available for a while, but is now tested on the Rifle World Shoot with great results.

I don’t know how many of the top shooters that use it, but more than a few in Europe.

According to the owner of the company Hannu Uronen his trigger group features:

Adjustable for 1-stage or 2-stage function.

Pull weight with regular springs 400-1100 grams. (That’s about 0,88 lb – 2.4 lb!)

Super crisp feeling.

The reset is less than 1mm.

Curved or straight trigger.

Shortest “Lock time” on marketDue to 9 gram hammer, where most of the weight is on bottom.

(I guess another word for the “lock time”, is “trigger group reaction time”)

Available for .154″ and .170″ pins

Adjustments have locking helicoil elements.
There are several different springs available, for the pre-travel as well as for the sear.

All together there are 9 different spring setups, plus various adjustments to be made.

The heaviest setups are usually used only in .458 Socom and Tactical rifles.
Uronen himself uses 500 grams trigger pull.
The trigger is Made in Finland, except some screws and helicoils.
The trigger pins only holds the module in lower receiver, so the hammer and the trigger rotate within the module – there is no stress to the receiver.
Light pull and very crisp feeling without bump-fire sensitivity, plus super short reaction time etc has been reached with best materials and unique design.

Kim Leppänen, Top Finnish shooter. He’s the current Standard Manual IPSC Shotgun World Champion and finished fifth at Rifle World Shoot where the video and the quote is from. You can see Kim shooting at a swinger, using an Uronen AR15 rifle with the trigger.

If you don’t know what to do for swingers, you can always spray and pray! I got answer for my praying in this spray


Link to Facebook Video: https://www.facebook.com/kimleppanensport/videos/1899132617009407/


Johan Hansen, who finished 4:th in Semi-Auto Open Senior at the World Shoot, is using the Uronen Trigger as well.

I managed to get a few quick photos of his setup as he was training for the World Shoot. Please excuse a somewhat dirty rifle, but it’s an AR-15 that sees a lot of use and not a safe queen.

This rifle is set to around 500 grams. Way too light for me (at least my current preference).

I tried the trigger on a few paper targets, the setup was too light (around 400-500 g) for my liking but this is a matter of personal preference and – not to forget – training. Almost before you think about jerking the trigger, the .223 leaves the barrel. It was quite nice at the long range, 300 meters, shooting prone with bipod.

The trigger sells for 395 Euro (around 440 USD), so it’s not on the cheap side. The aim according to Uronen was to build the best competition trigger.

If you’re interested you can find the trigger in this webshop, to my knowledge they ship internationally: Uronen Precision Modular Trigger Group, AR-15.

Which trigger is your favorite and what trigger pull are you comfortable with?

Update: There was a statement about which trigger Mr. Teemu Rintala was using. Toclarify, Mr. Rintala is in no way associated with Uronen Precision.

Eric B

Ex-Arctic Ranger. Competitive practical shooter and hunter with an European focus. Always ready to increase my collection of modern semi-automatic firearms, optics and sound suppressors. Owning the night would be nice too.


  • Dr. Longfellow Buchenrad

    Is it common to measure trigger pull in the metric system with grams instead of newtons?

    I dont know if I have ever discussed trigger pull in anything other than pounds, but I would think when speaking in metric, given that pull weight is definitely a force and not a mass, that it would be measured in newtons.

    • Pertti Metsänheimo

      Grams is the usual thing, because it is more familiar and devices for measuring them are abundant. Newtons go into the realm of serious physics or engineering calculations.

  • Veteran for Trump

    Since we measure trigger pull by how much weight (pounds and/or ounces) it takes to break, then grams is OK by me.
    Now, as to that price. WHAT?!?!
    $440 is a just a few dollars less that what it cost me to build my AR. No Way.

    • Gatman

      The price is certainly high and I suspect that with the incredible variety of triggers available in the U.S. not that many people will be willing to shell out this kind of cash. That said, in Europe the situation is different, as U.S. made parts are hard to come by and *very* expensive. As an example, Brownells Finland sells the Geissele S3G for €382 ($428) and the Hiperfire 24C for €349 ($392).

    • Pertti Metsänheimo

      … and for high level competition this might well be better than a Geissele or Wilson. What wouldn’t people pay for that last millimeter of accuracy or last 1/100 of a second…

    • Tuulos

      The price includes the 24% Finnish VAT and the higher overall tax increases the price anyway when compared to US made products. And as Gatman said, inferior aftermarket triggers tend to cost around the same when sold here.

  • samuli hakala

    sorry eric, but teemu do not use uronen trigger! teemu shoot jp-rifles ctr-02 with jp-trigger!

    • Tuulos

      Teemu does not use JP trigger either.

  • Longrange

    Uronen does not sell the trigger modules “as-is” because the need to be hand fitted to the rifles.

    • Tuulos

      He actually does, at least to out-of-country.

  • Teemu Rintala

    Hi. There was a statement about which trigger I was using during the IPCS Rifle World Shoot. I didn’t use Uronen trigger at the world shoot!
    I have used the UP trigger earlier, about two years ago, but I run into a few issues with it. First the hammer broke after 8000 rounds, and second there was no real warranty or any reasonable possibilities to buy spare parts.
    I’m happy without it.