Geissele Hi-Speed National Match Trigger for ARs Review

I continue to build out a Rock River Operator given to me as a gift with components I’m adding as my budget allows. A big step in the process was adding the Geissele Hi-Speed National Match Trigger #05-127. It is designed for NRA High Power Rifle competition with highly modified AR-15-type rifles. Geissele’s directions are refreshingly clear and honest about the installation. “The Geissele Automatics National Match/Designated Marksman Rifle (DMR) Trigger will lighten the trigger pull relative to a standard trigger. This lightened trigger pull will make the weapon easier to discharge. You must recognize and accept this fact before installing this National Match trigger. If you do not want a lighter than standard trigger pull, or are not willing to accept responsibility for your weapon’s safety, the safety of yourself, and the safety of those around you, do not install this trigger. Geissele Automatics recommends installation by a certified gunsmith only.” In the self-sealing clear-plastic package are  an installation tool, grease, oil, Allen wrenches, trigger and the hammer, and two dedicated pins that are used once everything else is installed and adjusted. Three trigger springs came with the unit: one for Service Rifle (total pull weight 4.5+ pounds), one for Designated Marksman Rifle (total pull weight 4 pounds), and the Match, the lightest of the three (2.5 pounds total weight), which I installed.

I will say right off that I chose the wrong spring weight, and that’s not Geissele’s fault. The RRA trigger ran about 4 pounds of let-off weight in its single-stage mode, and the gun delivered 2.5-inch groups with most ammo at 100 yards. Some of that was the gun—some was me. As I broke shots, my concentration would pull off the sight picture to feeling the trigger, which was heavier than I wanted. Also, I prefer two-stage triggers in my bolt guns, and I wanted the same in the Operator. The National Match Trigger certainly promised that kind of performance.

Installing the Match spring and trigger took me several hours because I was unfamiliar with its requirements. I won’t go into the detailed assembly process here, but if you’re considering buying this trigger, I suggest you first download the instructions and see if you want to tackle the job. The instructions for the NMT are here. There is also a series of Geissele installation videos here. Or you can find them by searching for “Geissele Automatics” on YouTube.

The videos were a big help. Before you get started, I’d recommend watching the video, “Choosing the Right Trigger for You.” If you decide on the Geissele NMT, there are videos that explain the installation in superb detail, and so does the instruction sheet that comes with the trigger. The first NMT installation video appears in the window below.

[youtube nolink] I want to give you the benefit of my mistakes and suggest for most AR-15s, the NMT set with the Match spring is simply too good. In my RRA Operator, the first stage required only 1 pound 5 ounces of pressure to move. The second stage broke at 2 pounds 3 ounces.

Also, consider whether you have the time and patience to work the trigger to perfection. I learned a lot installing the trigger, but I might have been just as happy to have taken it to a gunsmith with instructions on what I wanted—or Geissele will do the installation for you.

The NMT with Match spring is a fantastic trigger, and for match or bench use, I’d probably leave it as it is. My bench-accuracy results at 50 yards are super. But now I want this trigger to be a little less sensitive, so I plan to install the DMR spring next and see if I can keep the sweet let-off, but not have to be so careful with it. If I had it to do all over again, I’d start with the Service Rifle spring and move down from there.

Have you installed a Geissele trigger in your AR-15? How would you rate the experience—so easy a caveman could do it, or harder than that? Are you happy with the results? Let us hear from you in the comment section.

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Comments (6)

  1. This trigger CAN take several hours to install and SHOULD take at least an hour to fully set up and tune correctly. Obviously someone up above didnt bother reading the 13 page instruction manual.

    Some lowers will require modifications and occasionally youll have to modify your safety to employ this trigger. Well worth the trouble imo.

  2. I found the installation of the Hi-Speed National Match trigger to be extremely easy and it’s the first trigger I’ve ever replaced with the exception that I took out my mil-spec trigger once and reinstalled it. I a bit bewildered by the comments I have read that say it’s difficult to install. I think it took me about 20 minutes and that included taking it out and starting over for some reason when I was halfway done. I think the problem may be that the instructions that come with it are almost too detailed but I understand why Bob Geissele did that. His video is good but it goes into too much background. I found a much more straightforward video on the installation on YouTube that I highly recommend. Here’s a link:

  3. Several HOURS? I can install an engine and hook it all up in a BMW in several hours. Maybe you shouldn’t be taking your AR apart.

  4. Installed the Geissele 2-Stage on my SCAR 17S. If you had to choose 1 upgrade, this should be it. Installation was straight-forward but definitely watch the videos and not just the one on the Geissele web site. There are some better ones on You-Tube.

  5. I installed a Geissele match trigger in a full “space gun”over the course of an AR-15 match rifle build. Originally I was going to do the install on my lower my self, however my lower receiver had to go to the gunsmith who did the build of the upper for final fitting, test firing etc. and when he had it he did the install for me rather than send me the trigger kit(I had sourced the trigger from him). Trigger pull and let off were excellent after several thousand rounds of of practice, matches, and long range farm pest disposal pull and let off are the same as the original install. In 40 years of match rifle, small bore, and bench rest shooting this has been one of the most reliable better feeling triggers that I have used at a fraction of the price of some of them. Excellent upgrade to any AR build.

  6. I have this same exact trigger in my NM AR. All custom built from the ground up. The trigger was simple to install. I had never even built an AR15 before and I did the complete build of the lower in 1 – 1.5 hours. I LOVE this trigger. I like 2 stage triggers to begin with but this one is so smooth. I occasionally shoot highpower matches and this trigger is great.

    I built the lower from a RR stripped receiver.

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