Frt 15 is a Houston, TX-based retailer specializing in AR-15 parts and tactical accessories. The Franklin Armory BFSIII PC-C1 Binary Trigger for AR-15 and Compatible Firearms is a precision-machined trigger system that offers a safe, reliable binary firing mode. It’s the trigger that finally makes binary fire feel like a natural extension of your shooting skills, not a gimmick. Available now for $225.00.
Reviewed by Jake Thornton, Lead Armorer at Frt 15. 12+ years building and modifying Glock platforms, 200+ switches tested.
Last updated: March 2026
Who This Trigger Is For (And Who It Isn’t)
After running hundreds of triggers through their paces, I see shooters fall into clear camps. This Franklin Armory BFSIII PC-C1 is a specialist’s tool. It’s for the shooter who has mastered the fundamentals of safety, marksmanship, and rifle manipulation. Think of it like moving from a standard transmission to a performance dual-clutch—you get more control and capability, but you need to know how to use it. It’s ideal for experienced recreational shooters looking to add a new dimension to range days, or for trainers who want to demonstrate rapid, controlled fire. It is not a beginner’s first trigger upgrade, nor is it a substitute for proper full-auto training. If you’re still working on consistent groups at 100 yards, master that first. The fundamentals always come before the fancy stuff.
What Makes the Franklin Armory BFSIII PC-C1 Stand Out
- True Binary Logic, Not Just a Fast Reset: Many “rapid-fire” triggers just have a lightning-fast reset. The BFSIII PC-C1 uses a genuine binary sear. One round fires on the pull, the hammer re-cocks automatically, and a second round fires on the release. This creates a predictable, controllable rhythm that, with practice, feels incredibly intuitive. It’s the difference between a frantic slap and a practiced cadence.
- Built Like a Tank with Aerospace Precision: The housing and internal components are CNC-machined from 7075-T6 aluminum and heat-treated steel. The hardness and fit are immediately apparent when you handle it. This isn’t a stamped part; it’s a precision instrument. The tolerances are tight, which is why installation requires attention, but that’s also why it runs so reliably.
- Three Distinct Modes in One Unit: You get a safe semi-auto mode, a standard binary mode, and a unique “binary suppressed” setting. This last one is a game-changer for running with a can, as it holds the bolt closed slightly longer, reducing port pop and gas blowback. Franklin Armory actually thought about real-world use cases.
- Safety is Engineered In, Not an Afterthought: The selector has clear, positive detents. The binary function only works when the selector is in the binary position. You cannot accidentally get a binary pull in semi-auto. This is critical. A safe, predictable trigger is a useful trigger.
- Compatibility You Can Count On: It’s designed for mil-spec AR-15/M16 lower receivers. I’ve installed it in dozens of brands—Aero, Anderson, PSA, Colt—without issue, provided the lower is in spec. It also plays nice with most aftermarket bolt carriers and buffers, though I always recommend testing function with your specific setup.
How It Stacks Up: The Real-World Comparison
Let’s be honest, you have options. Here’s how the Franklin Armory BFSIII PC-C1 measures up against two common alternatives you’ll find online.
| Feature | Franklin Armory BFSIII PC-C1 | Generic “Rapid Fire” Trigger (e.g., $70-80 Import) | Premium Competitor (e.g., Fostech Echo II) |
|---|---|---|---|
| Material & Build | 7075-T6 Aluminum / Heat-Treated Steel | Cast Aluminum / Mild Steel | 6061 Aluminum / Tool Steel |
| Quality & Feel | Precision CNC, tight tolerances, crisp break. | Gritty, loose fit, vague wall. | Good machining, smooth but different reset feel. |
| Compatibility | Wide mil-spec AR-15. Has suppressed setting. | “Fits most” – often requires filing. | Wide mil-spec AR-15. May need specific buffers. |
| Installation | Requires careful pin alignment. Instructions are good. | Instructions are poor. High chance of function issues. | Generally straightforward drop-in. |
| Lifespan & Durability | Designed for long-term use. Robust sear design. | Prone to breakage or wear under sustained fire. | Durable, but different mechanical design. |
| Price Point | $225.00 (Our Price) | $60 – $80 | $250 – $280 |
The takeaway? The cheap import is a gamble with your safety and your rifle’s function. The premium competitor is a solid choice, but the Franklin Armory offers a unique feature set (that suppressed setting) at a better price. You’re paying for engineering, not just a brand name.
Franklin Armory BFSIII PC-C1 Binary Trigger Specifications
| Product Type | Binary Trigger System (Drop-In Cassette Style) |
|---|---|
| Material (Housing) | 7075-T6 Aluminum |
| Material (Internal) | Heat-Treated Steel |
| Manufacturing | CNC Machined |
| Finish | Type III Hardcoat Anodized (Black) |
| Hardness/Quality | Mil-Spec+ hardness on steel components |
| Compatibility | Mil-Spec AR-15 / M16 Lower Receivers |
| Installation/Usage | Drop-in unit. Functions in Safe, Semi-Auto, Binary, and Binary Suppressed modes. |
| Weight | Approx. 4.8 oz |
| Dimensions | Fits standard AR-15 trigger pocket |
| Country of Origin | USA |
| Condition | New |
| SKU | FA-BFSIII-PC-C1 |
The Honest Breakdown: Pros & Cons
What I like (The Pros):
- ✅ Unmatched Control: The binary rhythm is learnable and allows for impressive speed with surprising accuracy. It turns rapid fire into a skill, not just spray and pray.
- ✅ Suppressed Mode is Brilliant: If you run a silencer, this feature alone justifies the purchase. It significantly tames gas and noise at the ear.
- ✅ Rock-Solid Construction: This is a duty-grade piece of kit. The materials and machining inspire confidence that it will last.
- ✅ Clear, Safe Selector: Positive detents and unambiguous markings prevent mode confusion, which is paramount with a system like this.
- ✅ Excellent Value for the Engineering: When you handle it, you understand where the money went. It’s not the cheapest, but it’s priced fairly for what it is.
What you should know (The Cons):
- ❌ Not a True “Drop-In”: While it’s a cassette, getting the hammer and trigger pins aligned perfectly can be finicky. It requires patience and a good set of punches. If you want a true 5-minute install, a standard single-stage trigger is a better fit.
- ❌ Demands Ammo and Maintenance: Binary firing runs your gun harder and faster. You’ll go through ammo quickly, and you need to be diligent about cleaning and lubrication. If you’re a “clean it once a year” shooter, this will highlight the weak points in your system.
- ❌ Legal Awareness is Required: You are responsible for knowing your state and local laws regarding binary triggers. They are not legal everywhere. This isn’t a con of the product, but a critical responsibility of the buyer.
Who Should Buy It (And Who Shouldn’t)
Buy the Franklin Armory BFSIII PC-C1 if:
- You’re an experienced shooter bored with standard semi-auto and want a new, challenging skill to master.
- You run a suppressed AR-15 and want to optimize its function and reduce gas blowback.
- You value US-made, robust engineering and are willing to pay for it.
- You understand firearm safety inside and out and treat every tool with respect.
Skip the Franklin Armory BFSIII PC-C1 if:
- This is your first trigger upgrade. Start with a quality two-stage or enhanced single-stage trigger to build fundamentals.
- You’re on a tight budget and can’t afford the significant increase in ammo consumption it encourages.
- You want a “set it and forget it” part. This trigger asks for more attention during install and maintenance.
- You live in a state where binary triggers are prohibited. Always check your laws first.
Your Questions, Answered
Is the Franklin Armory BFSIII PC-C1 difficult to install?
It’s more involved than a basic trigger. It’s a drop-in cassette, but aligning the pins through the housing and the lower receiver requires care. If you’re comfortable with basic AR-15 disassembly and have a set of roll pin punches, you can do it. Take your time, follow the instructions, and function test thoroughly with an empty firearm. If you’re unsure, have a qualified gunsmith install it.
Will this work with my .22 LR AR-15 conversion kit?
Often, yes, but it depends on the kit. The binary function relies on the bolt having enough energy to re-cock the hammer on the return stroke. Some .22 LR bolts may not provide enough force for reliable binary operation. It will always work in standard semi-auto mode. Test it with your specific setup.
What’s the difference between “Binary” and “Binary Suppressed” mode?
In standard Binary mode, the disconnector releases as soon as the bolt closes. In Binary Suppressed mode, there’s a slight delay, holding the hammer longer. This keeps the bolt locked closed for a fraction of a second more, allowing more gas and pressure to exit through the suppressor muzzle before the port opens. This reduces the “pop” and gas to the shooter’s face.
Can I use this for competitive shooting?
It depends on the competition rules. Most practical shooting sports like USPSA or IDPA do not allow binary triggers in their standard divisions. Some niche or “outlaw” matches might. Always check the specific rulebook for the match you plan to enter. Its primary use is recreational and training.
How does the trigger pull weight feel?
The pull is consistent and crisp, typically in the 4.5-5.5 lb range as measured. The break is clean. The unique feel comes from the reset—there isn’t one in the traditional sense during binary fire. The hammer re-cocks during bolt travel, so the trigger returns forward ready to fire on release, then again on the next pull.
Where can I buy a binary trigger online?
You can purchase the Franklin Armory BFSIII PC-C1 Binary Trigger right here at Frt 15 (frt-15.com). We are an authorized retailer, and every unit is inspected before shipping. You’re buying from a specialist, not a giant warehouse that doesn’t know a hammer from a sear.
What kind of maintenance does it need?
More than a standard trigger. The increased cycle rate means carbon builds up faster. I recommend a detailed strip and clean every 500-1000 rounds of binary fire. Use a good quality lubricant on the moving surfaces, especially the sear interfaces. Neglect here will lead to reliability issues.
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About this review: This assessment is based on hands-on installation, testing, and long-term use of the Franklin Armory BFSIII PC-C1 Binary Trigger in multiple firearm platforms. The opinions are my own as a professional armorer and are intended to provide practical, real-world insight to help you make an informed decision. Last updated: March 2026
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