Today I had the opportunity to shoot the Tac-Con 3MR trigger system. This drop in trigger pack for AR15 rifles enables a 3rd position on the selector lever. What does this 3rd position do? On a conventional select fire machine gun it would set the rifle to “rock and roll” and if you pulled the trigger back the gun would keep firing until the magazine was empty or you released the trigger.
That’s not what the 3MR does, but it’s almost as cool.
The 3MR allows the shooter to simulate full-auto fire by way of a very ingenious trigger modification that’s 100% BATF legal. How the trigger works is by using the bolt carriers rearward motion to push the trigger forward thus aiding in the reset. If you hold the trigger back, it fires a single shot. If you slightly release your finger, the trigger will move forward with your finger during recoil and shorten the next pull considerably. When you go to pull the trigger again you can do so very quickly and that’s how it simulates automatic fire.
It does take a little practice to master, however I was able to pick up a sample rifle and immediately knock out very quick 2 and 3 round bursts. If I had to guess the cyclic rate, I would way it was in the neighborhood of 500-600 rounds per minute (M60 speed). You can go faster or slower depending on your level of experience.
As a bonus, when the 3MR is set to the standard single shot mode it’s a very clean, almost match grade, trigger with a 4.5lbs crisp break.
I found the 3MR to be easier to master than a bump-fire stock when simulating fully automatic fire. Not only did I find it a little easier to master, but I also really like the seamless integration of the system into your rifle.
The first step to installing the 3MR is to remove the factory trigger components, but keep the two OEM trigger pins handy. The 3MR is in a self contained trigger pack that you simply sit into position and pin back into place with the OEM pins. If you’re familiar with AR’s you’ll be able to perform the conversion quickly and easily.
I did come home with my own copy of the $495 device that I will install in one of my AR15’s. I’ll play with it for a few weeks then shoot a MAC video of the trigger system in action. What I can say so far is the system worked VERY well for me on the range today. I was able to fire 4 magazines through two different demo rifles and by the end of my time on the range I was running the guns at probably 700+ rounds per minute.
Here’s a company produced promotional video about the 3MR: