A binary trigger is one of the latest additions to the rifle world and gives you a small taste of how an automatic weapon feels. It functions basically by firing two rounds in one trigger pull action, providing a more effective firing mechanism.
Finding the right binary trigger for your specific AR-15 and one that fits your needs can be daunting, which is why we compiled a list of the six best binary triggers on the market based on our own experience and tests. We further discuss what other accessories are a must if you want to optimize your AR-15 performance.
Table of Contents
What Is A Binary Trigger?
A binary trigger is a type of firing system. It allows a firearm to discharge one round when you pull the trigger and another when you release the trigger. Basically, doubling the effective rate of fire of the AR.
This mode allows for quicker follow-up shots, making it an intriguing option for many gun enthusiasts, especially if they completely understand how binary triggers work in an AR-15 and can use it to their advantage.
How Do Binary Triggers Work In An AR-15?
In an AR-15, binary triggers function in three positions – “safe,” “semi,” and “binary.” mode. In the binary firing system mode, the hammer is released both when you pull the trigger and during trigger release.
A binary trigger fires at a higher rate than a traditional semi-automatic weapon but still less than a fully automatic weapon. When you have one of the best AR-15 binary triggers installed, it makes for a truly unique and satisfying shooting experience.
6 Best AR-15 Binary Triggers
Upgrading to one of the best binary trigger systems is a game-changing move. It allows you to get the most out of your AR-15 by enhancing the response rate and increasing accuracy. Below we discuss the best AR-15 binary triggers based on our own field tests and experience.
- BFSIII AR-C1 BINARY TRIGGER – Editor’s Pick
- BFSIII HK-C1 BINARY TRIGGER – Best Ambidextrous Trigger
- Fostech Echo AR-15 Trigger – Lightest Trigger
- BFSIII AR-S1 BINARY TRIGGER – Best Hunting Trigger
- BFSIII CZ-S1 Trigger Binary – Fastest Trigger
- BFSIII RUGER PC CARBINE CURVED BINARY TRIGGER – Cheapest Trigger
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1. FRANKLIN ARMORY BFSIII AR-C1 BINARY TRIGGER
Franklin Armory is notorious for producing excellent binary triggers; in fact, they are the ones who invented it back in 2015. The AR-C1 is the best binary trigger on the market. It has a comfortable trigger pull weight of 4.5 lbs, +/- 0.5 lbs. Its wide compatibility with AR platforms – 5.56 NATO, 308 Win, 300 BLK, etc. – makes it a very versatile option for any AR enthusiast.
It features the standard curved trigger shape, which is a tried and tested shape and is very comfortable. The AR-C1 also features a 3-position trigger operation – Safe, Semi, and Binary – providing more control over your ARs functionality.
In my experience, the AR-C1 is an all-rounder, proving useful in various shooting situations. Whether on the range or in the field, the reduced split times between rounds help achieve tighter groupings and more accurate shot placement when hunting.
The Franklin armory binary trigger AR-C1 is the perfect all-around binary trigger. And with a price of $429.99, it won’t break the bank!
2. FRANKLIN ARMORY BFSIII HK-C1 BINARY TRIGGER
Next on our list, we have another Franklin binary trigger – the HK-C1. Although it costs $160 more than its number counterpart, it does feature some handy upgrades. For starters, it has an ambidextrous safety selector, making it perfect for those who can shoot with both eyes. It is also much easier to install, thanks to the smarter and more user-friendly design.
When I tested the HK-C1, it was also evident that it has an incredibly smooth trigger pull with a trigger pull weight of 4.5 pounds. It also proved to have a consistent firing experience, and the 3-position trigger makes it versatile for different situations. This binary trigger will fit most HK 91, 93, & MP5 variants and clones.
Ultimately, the HK-C1 binary trigger is suited for those avid shooters who want to fine-tune their trigger system with incredible precision. If this sounds like you and you have the money to spare, then you should definitely consider opting for this trigger.
3. Fostech Echo AR-II Drop-In Binary AR-15 Trigger
Third on our list we have Fostech – a brand known for producing high-quality AR parts. This binary trigger only weighs 4 ounces, thanks to the proprietary stainless steel alloy construction, so you’ll hardly feel the weight difference when it is installed on your rifle.
It has a trigger pull weight of 4.5 – 5 pounds and features the standard curved trigger shape. The installation process is also incredibly simple, thanks to the drop-in design.
During my testing of the Fostech, it was evident that this trigger is not only easy to install but provides a light, clean and crisp pull, which can elevate anyone’s shooting experience to the next level. At a price point of $479.99, this binary trigger is definitely worth considering.
4. FRANKLIN ARMORY BFSIII AR-S1 BINARY TRIGGER
Fourth, we have the AR-S1 from Franklin Armory. Similar to the AR-C1, the S1 also has a trigger pull of 4.5 lbs, +/- 0.5 lbs. However, its main difference comes in its unique trigger design. Featuring a straight flat-faced trigger shape, it brings quite a unique feel and appearance to your AR.
I found this trigger system most ideal for range shooting, where you can lie or stand still, unobstructed by surrounding brush, as is the case when hunting.
At a price point of $429.99 and considering its unique design, it’s definitely a binary trigger you should consider if you want a system that is compatible with various calibers and wants something specifically for competition or range shooting.
5. Franklin Armory BFSIII CZ-S1 Trigger Binary
The CZ-S1 is also a unique binary trigger. It’s manufactured for the CZ Scorpion EVO3 and provides some of the fastest semi-automatic trigger performance I’ve experienced.
The trigger also features an ambidextrous design, allowing you to quickly switch shooting hands in case your shooting situation requires it. Additionally, the straight trigger shape makes it better for rapid shooting situations than the more traditional curved-shaped trigger.
At $519.99, it is very fairly priced compared to the rest of the binary trigger market, considering it is only made for one gun model. Overall, this binary trigger is a perfect fit for those who want to squeeze out every bit of performance from their CZ scorpion. It may also benefit from a proper AR-15 Trigger Job as well!
6. FRANKLIN ARMORY BFSIII RUGER PC CARBINE CURVED BINARY TRIGGER
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Lastly, we have the Franklin Armory PC Carbine trigger, which is designed specifically for the Ruger PC Carbine, 9mm and .40 Cal.
This binary trigger features quite an unconventional curved flat shape, which I tend to think compliments the uniqueness of the Ruger PC carbine. Don’t get me wrong; I loved shooting with the PC Carbine trigger – it makes the experience more exciting while offering a smooth operation.
This binary trigger is also the cheapest on the list at $299.99 and makes it perfect for those just starting out with trigger upgrades and having a compatible gun model. Franklin binary triggers are amongst the best types of ar triggers on the market today.
How Do You Install A Binary Trigger In An AR-15?
To install a binary trigger AR15 system, you need to know the intricacies of the lower receiver. If you bought an aftermarket lower receiver, the installation process will go much faster compared to if you bought a complete AR-15.
First, you need to disassemble the lower receiver, removing the existing trigger and replacing it with your binary trigger.
Installing a binary trigger system correctly can be difficult, so be sure to read the installation guide thoroughly. I would even advise you to hire a professional gunsmith if you are new to AR-15 modifications, ensuring a proper installation.
What Other AR-15 Modifications Are Worth It?
One of the reasons why the semi-auto AR-15 is so popular is because of the amount of worthwhile AR-15 modifications you can get for your rifle – there’s literally a modification for almost every use case. For example: if you want better accuracy for competition shooting, you can get a free-floating handguard. These types of handguards do not come in contact with the barrel, allowing the barrel to vibrate freely.
An additional worthwhile modification includes bolt carrier groups that are compatible with binary modes, which allow for the smooth firing and ejecting of AR rounds.
However, the most worthwhile modification you can get for an AR-15 has to be an AR-15. Investing in an AR-15 red dot sight or magnified scope enhances your shooting capabilities dramatically because it increases target acquisition rate, shooting range, and shooting accuracy.
Expert Tip: Make sure your modifications are compatible with each other, as they can impact each other’s performance.
Does The AR-15 Lower Receiver Impact Which Binary Trigger Is Best?
Yes, your AR-15 lower receiver impacts which binary trigger is best for your rifle. This is because not all binary triggers work with every AR-15 lower receiver.
It doesn’t have to be a huge incompatibility – it can be something as little as a loose fitting of the trigger system or a screw-hole that doesn’t match. But these slight discrepancies between the AR15 lower receiver and the trigger system can develop into huge problems. For instance, a loose fitting can be a safety hazard, or the screw hole that doesn’t match can be a place for grime and residue to enter and come in contact with the integral parts of your AR-15.
Will Adding A Red Dot Sight Improve AR-15 Performance?
Adding a red dot sight to your AR-15 can improve its performance dramatically. An AR-15 red dot sight improves your target acquisition rate, enhances your accuracy, and allows you to shoot better in low-light conditions. It’s so effective in improving AR-15 performance that competition shooters and tactical officers prefer it over iron sights.
Frequently Asked Questions
Are binary triggers legal for your AR-15?
Do binary triggers create more recoil?
Why do people choose to use a binary trigger system?
The Bottom Line
Binary triggers are an innovative addition to your AR-15 rig, offering a unique firing mechanism that changes how you engage with targets. However, it is important you understand how they work, how to perform a proper installation, and to research whether it is legal in your state. Whether or not this modification is for you depends on your individual needs and preferences, but it undoubtedly adds a new dimension to the AR-15 platform by giving you a small taste of an automatic weapon.