Review: New Franklin Armory Gen 3 Binary BFS III Trigger—–A Very Fast Firing Trigger!

Franklin Armory released the new BFSIII binary trigger this week. For those not familiar with a binary trigger it’s really very simple with each trigger pull the weapon fires as the trigger is released the weapon fires again. So, each trigger stroke fires two rounds.

The trigger comes with a stick on indicator that shows safe, fire and finally binary. It should pose no problem since the first two settings are identical to any other AR trigger. Normally the third position doesn’t exist on a standard AR trigger and again that activates the binary function on the BFSIII.


One thing I can’t deny about this trigger it is a load of fun set on binary with both rounds striking very close to each other. I’m not sure what the average rate of fire is but it doesn’t take very much practice working the trigger to get as close to automatic fire as I’ve experienced with any other semi-auto trigger. My advice is once this trigger is installed take a good amount of ammo with you to the range the first time out because you won’t want to stop shooting! This short video clip gives you some idea of how fast it is. I got better at manipulating the trigger after the video was shot so consider this a bit less than the max rate of fire. Please excuse the wind noise.

The BFSIII ships with the trigger, two sets of springs (one set stronger than the other) as well as a three position fire selector.The stick on selector indicator is also included. The included instructions are simple and if you have prior experience with building an AR it’s simple to install and follows almost the same steps as installing any other AR trigger. The trigger also works on any 9mm or 22 LR AR15. No modifications are needed. I used it with my CMMG 22 conversion and had no problems. This upgraded model is very reliable. The coating is dark black oxide finish.

Included Components

Included Components

Trigger pull on the one I tested measured right at four pounds. The trigger is crisp and feels good. The binary trigger feels nearly the same. You can feel the break for the second shot as the trigger is released. This is one useful trigger for competition and just a good time at the range.

From Franklin Armory:

The revolutionary Binary Firing System™ will be appreciated by three gun competitors, tactical shooters, and recreational enthusiasts. It features a three position selector that allows the user to switch from Mode 1 for Safe, Mode 2 for traditional Semiautomatic Mode, or Mode 3 for Binary Mode. In Binary Mode, the firearm will discharge one round with every function of the trigger whether a pull or a release. A user can negate the round that would otherwise be fired during the release function by simply moving the selector back to Mode 2 and then safely releasing the trigger.

component view

* Easy to install. No custom fitting.
* Better trigger pull. 4.5 pounds, +-.5 pound
* The release phase now has a positive reset.
* New design eliminates backup disconnector.
* Stronger buffer spring (included) reduces the possibility of hammer follow.
* Works in every AR application: AR10, AR15, MPX, etc.
* Works in our F17 series in .17 WSM WITHOUT modification.
* Works on .22LR uppers WITHOUT modification.
* Works on 9mm uppers WITHOUT modification.
* MSRP $429.99

FRanklin Armory Website

Phil White

Retired police officer with 30 years of service. Firearms instructor and SRU team member. I still instruct with local agencies. My daily carry pistol is the tried and true 1911. I’m the Associate Editor and moderator at TFB. I really enjoy answering readers questions and comments. We can all learn from each other about our favorite hobby!


  • Jambo

    Video is private. I will have to imagine instead.

  • BillC

    I’m not complaining about the price, since I’m not in that market, but it still remains expensive to what amount to a novelty. Maybe when and if it becomes a 1/4th of what it costs now, I’d put one on a range toy.

    • Reef Blastbody

      Several friends have opined that for hunting feral hogs here in TX with 5.56/.223 or .300BLK, that a 2 shot burst option would be a great thing to help ensure a kill on the first trigger pull. This sounds like it’s effectively that, albeit in a way that doesn’t trip NFA and the Hughes Amendment.

      • Rick O’Shay

        That’s exactly why I’d buy it. For that instant follow up.

    • Not Gersh Kuntzman

      Legal “two round burst” for under $450 versus $20,000 to $30,000 for a legal machine gun.

      Got to look at it from the perspective of the NFA.

      • RealitiCzech

        Your avatar gave me PTSD.

        • Not Gersh Kuntzman

          Good. You probably deserved it.

        • Ebby123


      • Budogunner

        Or you could but a bump fire stock for much less.

        I hate the NFA pricing argument because that is why the bump fire stocks are so obscenely overpriced, too.

        • Not Gersh Kuntzman

          The bump fire stocks are also absolutely atrocious looking, not to mention that you also sacrifice the flexibility of the adjustable stock.

          Since the NFA is a thing and we most likely will have to deal with it forever (since repealing the NFA would cost the government a lot of money in tax stamps with the recent surge in popularity of suppressors and repealing the Hughes Amendment is a political non-starter), binary triggers like this and the Fostech Echo are the best option (unless you want to look like an idiot with a bump fire stock).

          • Ben Pottinger

            So there are lots of reasons why the NFA will have lots obstacles to its removal, but this particular issue isn’t one of them. The total income from Form 1/4s in 2015 was roughly 22 million dollars. 22 million dollars to the government is about the same as a few pennies are to you. The ATF alone has a 1.2 *billion* dollar yearly operating budget or over 25 times the NFA tax income (which, incidentally, they don’t get to keep and doesn’t effect their budget).

            So no, the tiny amount of tax income isn’t of even the slightest concern, if it was why would they have made the 41b changes that will certainly reduce the income (by making it harder to buy NFA items). If it was income they were concerned with they would want to increase the number of sales.

            No, the current executive branch would be more than happy to completely stop all NFA income if it meant also stopping all NFA sales.

            So let’s stop talking about why we think we will never improve our access to this or that type of firearm and instead stay on top of legislators. I’m guessing many of the pessimists of the 90s would have said no way we would be able to CCW across almost the entire country and who would have guessed silencers would become almost mainstream firearms items in as little as a 6-8 year time period? The hearing protection act has 77 cosponsors and I suspect many people just a few years ago would have said that was impossible. Keep the pressure on and maybe just maybe we will be able to buy them like any other firearms item in a few years.

          • Don La Rue

            The one lookin’ like an idiot when comparing a slide fire and legal full auto, is the guy that spent $15,000 plus on a gun that doesn’t shoot as fast or much faster and really isn’t any more controllable as the $100 slide fire stock…I just might have to get that Fostech Echo though, as the double tap it delivers is the best all around tactical solution.

  • Black Dots

    Just gonna sit here and wait ’til some graphic design hero changes the image to say “Safe Semi Bi-curious”.

  • Reef Blastbody

    Have they addressed the issue of the hammer following the bolt carrier home if you’re a little too quick on the trigger? Tim Harms (Military Arms Channel) had that issue with what I presume is a Gen 1 BFS equipped rifle. He’d get a little too quick on the trigger and it’d follow the bolt home, requiring him to cycle the action, ejecting a live round, to continue firing.

    The Fostech Echo trigger, while it does require their modified bolt carrier, has some bits to prevent just such an occurrence.

    • They have indeed. I had zero malfunctions of that type or any other. I shot 500 rounds and got pretty good at working the trigger quickly.

      • Reef Blastbody

        To quote a famous Vulcan, fascinating!
        I’d be tempted to put one in something like a CMMG Mutant or a KS-47. Would make a great bacon making machine.

    • Sianmink

      Yeah, they’ve gotta be pretty good to compete with the Fostech Echo from what I’ve seen.

      • I’ve tried both and I give the Franklin an edge because you can use it on so many types and calibers with no proprietary bolt carrier.

        • Flounder

          is the carrier really proprietary? MAC showed it being pretty much an M16 carrier with a radius on the bottom. which if one were desperate could be done with 5-10 minutes on a dremel… I ask because I haven’t had the opportunity to see one in person.

          And what do you think about the price?!?!?!? The echo is 20 bucks more but comes with their bolt carrier! Not even Giessle charges this much for any of their triggers!

          • I guess it just comes down to preference. Which one feels the best to you and functions in a way you prefer. Having to have a new bolt carrier or working on my own which may not allow it to work normally is a negative for me.

          • Budogunner

            I admit they had my curiosity until I saw the price tag. Cut that in half and I’d might try one out

  • Pod

    I have a Spike’s Tactical Honey Badger lower that this’ll be perfect for. The rollmark indicators say SAFE-SEMI-DON’T GIVE A S–T …

  • gunsandrockets

    Oh boy, now I’m imagining this as part of a .204 Ruger caliber AR build. Maybe some day…

  • Cymond

    Interesting that it works with 22lr now. Originally, they stated on Facebook that the BFS would only with with a 22 kit in release mode.

    • Muad

      That was the Gen2 BFS, not the Gen3.

  • RocketScientist

    I’m amazed this comment section hasn’t devolved into a flame-filled argument about how unsafe this trigger group is, like virtually every other time ive seen it come up as a topic on a firearms site.

    • Rusty S.

      Simple, follow the cardinal rules and safety is covered. No more “unsafe” than any other gun. Let’s not forget the fact that the firing pin contacts the primer on every round chambered in an AR.

    • Cymond

      I know, right? That’s what I was expecting to see, too.
      Maybe they’re tired of going round & round about it. Or maybe they’ll start soon.

      Personally, I don’t see it as any less safe than a 3-round-burst or select-fire trigger. It shouldn’t be like 2 distinct shots, it should be used like a double tap with a very fast split time.

    • More knowledgeable readers:-)

    • It’s “less safe” than a standard trigger, sure, but so is a super lightweight single stage match trigger; it’s not the rifle’s fault if it’s picked up by a moron, and a moron with a rifle in his hand is dangerous no matter what sort of accessories it has.

  • Not Gersh Kuntzman

    Now make one for the SCAR 16/17.

  • BrandonAKsALot

    Seems fun. I’ve always kind the idea of two round burst, probably thanks to the Russian weapons of late being designed with it.

  • Gary Kirk

    Neat toy, glad they finally included the safe release like the Fostech.. I have no use for it, but like slide fire stocks, to each their own. I couldn’t justify the waste of ammo..

  • TechnoTriticale

    What’s the protocol (if any) for cancelling the second shot?

    For example, can you move the safety to SAFE inside a shot pair?

    • Just select the second position like you would with any AR trigger and you get one shot.

    • Now if you mean can you stop the second round from firing if the selector is in binary yes you can negate the second round after firing one round. Just flip the selector into position 2 and release the trigger and no second round fires.

  • Just like actual NFA giggleswitches, even if I could afford it, I’m still of a mind that my trigger finger is my most effective fire control group.

    Looks like a lot of fun, though, and the fact that the selector switch on an AR is so dirt basic easy to manipulate without dropping a firing grip undercuts any concern about the safety of the device that wouldn’t already apply to the user in the first place.

  • HH

    I had major issues with hammer follow on the last gen. binary trigger.
    I need to see video of entire mag dumps to verify that they “fixed” this issue.
    The video above is entirely insufficient for such.

  • Joe

    So, we should see a head to head between this and the Fostech soon, may the best trigger win. I would love a binary trigger for the PS90, I don’t know if I trust one 5.7×28, but I think I could trust two.

    • CharlesH

      Get a 5.7×28 AR upper, problem solved!

      • st4

        Do want to see that setup in action.

    • Could be:-)

    • Leigh Rich

      Fostech won’t be out until maybe December.

  • J.T.

    They would have to cut the price in half in order for me to ever consider it.

  • Ben Pottinger

    How are they handling buyers of the previous 2 gen triggers? Are they offering free upgrades? That’s kind of a big deal considering how badly the first gen performed and how much they cost. If their treating early adopters well then I might consider this over the fostech since fostech doesn’t feel inclined to discuss anything with the public about their trigger. Will it work without the carrier, will it work on a 9mm or 22lr or piston gun, will it ever be released, do the changes invalidate the ATF letter, will it ever be released?! Etc etc..

    • Jason Offret

      I bought a 2015 Truck, they should give me a free-trade to a 2016 Truck?

      • Ben Pottinger

        It depends. Was the truck marketed as being really really fast but then when you got it it stalled out and died if you didn’t press the gas pedal just right? Then after some research online you discover some people have done massive engine upgrades that mostly correct the stalling and they can go reasonably fast without it stalling and having to be restarted repeatedly. And then did the truck maker go and fix the problem with a 2015.2 model a month or two later only to discover a few more problems and then release a 2015.3 another month or two after that?

        Was their a stawman laying in the back of your truck when you bought it?

        • Redbeckroadracer

          There were two things to consider with G2. The Backup Disconnected and the issue of hammer follow. The BUD was averted by pulling through and releasing through. Reset shooting on release with G2, caused the BUD to engage. It isn’t hard to learn how to avoid bud engagement. If it took more than a mag or two, you probaby had other issues.

          The hammer follow was easy to prevent. Either go as slow as the fostech prototype or make your carrier go faster by changing springs or drilling out the gas port. (That’s not exactly analogous to doing an engine rebuild.)

          G3 fixed these issues. So WTF? Are you butt hurt because improvements were made. Thinking like that would keep us all in the fricken stone age! G2 is still a bad as’s trigger unlike anything else AVAILABLE on the market, but still you hate. …don’t get it.

          • Ben Pottinger

            I “hate it”? I’m “butt hurt”? WTH did you come up with that? I’m just asking if they are using their first customers, the ones who took the most risk, as beta testers and then throwing them under the bus without upgrading the triggers for them? You still haven’t answered that at all your just tossing a fit. There isn’t anything wrong with making quick and aggressive improvements to your product, but if it’s a premium product (and this certainly is a premium priced product) it makes good business sense to keep your original customers happy. If franklin armory just go “gosh, thanks for finding those problems for us so we can fix them for the next guy who buys one. BTW if you want those improvements your welcome to buy another 400$ trigger!!” its going to (rightly so) upset some customers pretty seriously. Are they doing that? You haven’t bothered to answer that you just raged about how my customer service question was going to keep us in the stone age.

            So I’ll try again, are they upgrading gen 1/2 owners to gen 3 specs, either free or through some upgrade program? (and I’ll email FA directly since I’m more likely to get an actual answer from them then get some keyboard rager who thinks im de-manning him by asking about his favorite products customer service experience).

          • Redbeckroadracer

            Dude, they launched the G2 last year round about September. They didn’t use people as beta testers. They offered the best design they had at the time, but now they have something better. Now it is a year later, and they have a new model that costs even more. Do you get mad at Sony when they make a new TV that’s bigger and has better resolution? Does Sony give you a discount for buying a new TV?

            Try contacting Franklin. Maybe they will give you a break, but don’t whine about them innovating and delivering fresh ideas to the market?

          • Ben Pottinger

            Why would they give me a break? I don’t own any of their triggers. All I’m asking is do they offer upgrades for existing customers, and they don’t, they said as much.

          • Leigh Rich

            Ben. Stupid question. Gen 2 is a drop in and the Gen 3 is not a drop in. My Gen 2 works. I am sure you do not want to buy one because you can’t afford it. However blems are for sale for only $318 for Gen 2s at FA. Buy before they are gone.

          • Like I said contact them. I doubt it myself but who knows.

    • You’ll need to contact them on that question.

    • Leigh Rich

      Gen 2’s work fine. Bet you don’t even have one Ben.
      Gen 2 is a drop in and Gen 3 is not. So no.

  • zaqzilla

    I have a hard time rationalizing $429.99 for a trigger.

  • Sking

    My thought is: what effect would combining this trigger with a bump stock produce?

  • Markbo


  • Joe Gamer

    That price…