Best Binary Triggers 2026: BFSIII by Platform header image
Gear
June 19, 2026
Best Binary Triggers 2026: BFSIII by Platform

Where both are legal, a forced reset trigger usually beats a binary on price and simplicity. The binary's real buyer is the shooter whose state law targets the forced-reset mechanism but not pull-and-release firing. Here is the Franklin Armory BFSIII lineup ranked by platform, the Fostech Echo alternative, and the legal distinction that decides which one you can actually run.

Our Top Picks

  1. #1 Franklin Armory BFSIII AR-Essential ($299.99): Best overall binary trigger and the value pick for AR-15 at $299.99
  2. #2 Franklin Armory BFSIII CZ Scorpion ($449.99): The binary upgrade for the CZ Scorpion, ambi safety included
  3. #3 Franklin Armory BFSIII SP-S1 Stribog ($449.99): The drop-in binary for the Grand Power Stribog SP9 family

Our Top Picks

1
Franklin Armory BFSIII AR-Essential
Best overall binary trigger and the value pick for AR-15 at $299.99
$299.99
2
Franklin Armory BFSIII CZ Scorpion
The binary upgrade for the CZ Scorpion, ambi safety included
$450
3
Franklin Armory BFSIII SP-S1 Stribog
The drop-in binary for the Grand Power Stribog SP9 family
$450

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IntermediateAR-15Triggers

Best Binary Triggers 2026: BFSIII by Platform

The best binary trigger for most shooters is the Franklin Armory BFSIII AR-Essential at $299.99, and the binary trigger market is effectively the BFSIII line across four host platforms plus the Fostech Echo. But the honest framing comes first: where both devices are legal, a forced reset trigger beats a binary on price and cyclic rate. The binary's real buyer is the shooter whose state law targets the forced-reset mechanism but not pull-and-release firing. This guide ranks every binary by platform, calls the FRT-vs-binary decision straight, and points you at the state-by-state legal map you must read before you order.

By AB|Last reviewed June 2026

What a Binary Trigger Actually Does

A binary trigger fires one round when you pull the trigger and a second round when you release it. That is the whole mechanism: two shots per complete trigger cycle, controlled by a three-position selector that adds a binary mode after safe and semi-auto. Move the selector back to semi or safe and the gun behaves like any other semi-automatic. Nothing about it is automatic fire; each shot still requires a separate, deliberate trigger function, which is exactly why the ATF treats it as a Title I trigger and not a machine gun.

Why people buy one: a binary roughly doubles your practical rate of fire for range work and certain rate-of-fire competition formats. It is a recreational and competition tool, full stop. It is not a defensive or duty upgrade, it burns ammunition fast, and it rewards no practical accuracy. If you want a better trigger for shooting tight groups, that is a two-stage match trigger, covered in the AR-15 trigger guide, not a binary.

Binary Trigger vs Forced Reset Trigger: The Honest Call

Before you spend $300 to $480 on a binary, understand what it is competing with. In any state where both are legal, a forced reset trigger is the more cost-effective rate-of-fire device. It is cheaper and it cycles faster. The binary's entire reason to exist for a specific buyer is legal, not mechanical.

Mechanism
Binary TriggerOne shot on pull, one on release (two per cycle)
Forced Reset TriggerFires on pull only; spring forces the trigger forward against your finger
Entry price
Binary Trigger$299.99 (BFSIII AR-Essential) and up
Forced Reset Trigger~$43 to $139 for a functional entry
Practical rate
Binary Trigger~400 to 600 RPM
Forced Reset Trigger~1,000 to 1,200 RPM
Bolt carrier / buffer
Binary TriggerBFSIII runs a standard BCG; Fostech Echo needs an M16 carrier
Forced Reset TriggerOften needs full-auto-rated BCG and an H2/H3 buffer
State-law footprint
Binary TriggerBanned in fewer states than FRTs
Forced Reset TriggerRestricted in a longer list of states

If you live somewhere both devices are legal, the math points at the FRT. Read the forced reset trigger buyer's guide and the Super Safety guide for the cheaper, higher-RPM side of this decision and the lower-pocket compatibility a forced-reset selector needs.

Best Binary Triggers by Platform

Ranked by what most buyers actually need. The AR-Essential is the value pick and the one to start with; the three platform-specific BFSIII kits cover the major pistol-caliber carbines; the Fostech Echo is the AR-15 alternative for shooters who want a non-Franklin option.

1

Franklin Armory BFSIII AR-Essential

Best overall binary trigger (AR-15)

$299
View at OpticsPlanet
  • +Most affordable AR-pattern BFSIII at $299.99 MSRP, well under the AR-ELITE and the Fostech Echo
  • +Drop-in for mil-spec AR-15 lowers with no proprietary bolt carrier group required
  • +Three-position selector (safe, semi, binary) preserves normal semi-auto operation
  • −Single-sided safety paddle only; no ambidextrous selector in the box
  • −Range and competition tool only; not appropriate for any duty or defensive use
  • −State restrictions vary and must be checked against current law before purchase
2

Franklin Armory BFSIII CZ Scorpion (CZ-C1)

Best for the CZ Scorpion

$449.99
View at OpticsPlanet
  • +Includes an ambidextrous safety selector, so the install also covers the factory safety upgrade
  • +Curved (CZ-C1) or flat-faced straight (CZ-S1) shoe options to match preference
  • +Three-position selector keeps standard semi-auto on tap
  • −Most expensive Scorpion trigger upgrade by a wide margin at $449.99
  • −Installation is more involved than a simple trigger shoe swap
  • −Not compatible with the HB Industries Scorpion spring kit
3

Franklin Armory BFSIII SP-S1 (Stribog)

Best for the Grand Power Stribog

$449.99
View at OpticsPlanet
  • +Drop-in fitment across most 9mm Stribog SP9 models (A1, A3, A3S)
  • +Three-position selector preserves normal semi-auto operation
  • +Move the selector to safe before release to abort the release shot
  • −Most expensive Stribog trigger upgrade by a wide margin at $449.99
  • −Not compatible with the HBI short-stroke buffer (HBI rates that buffer semi-auto only)
  • −10mm and 45 ACP Stribog variants are not supported
4

Franklin Armory BFSIII B&T-C1 (APC9 family)

Best for the B&T APC9 family

$449
View at OpticsPlanet
  • +Drop-in fitment across the APC9, APC45, GHM9, GHM45, and SPC9 (incl. Pro and K)
  • +Three-position selector preserves normal semi-auto operation
  • +About 4.5 lb pull weight with reduced split times in binary mode
  • −Premium price at $449.99 for a competition-only feature
  • −State restrictions vary and must be checked against current law before purchase
  • −Reset and release-shot timing require retraining
5

Fostech Echo AR-II

Best non-Franklin AR-15 binary

$479
View at OpticsPlanet
  • +Accepts any full-auto (M16-cut) carrier; no Fostech proprietary BCG required, unlike older Echo designs
  • +Three modes: safe, semi-auto, and Echo (pull-and-release) mode
  • +HIPERFIRE-derived internals with a metallic stainless finish
  • −Most expensive AR-15 binary option at $479.99 MSRP; the Franklin BFSIII AR-Essential undercuts it
  • −Requires a full-auto (M16-cut) bolt carrier group; the drop-in Franklin BFSIII does not
  • −Range and competition tool only; not for duty or defensive use

Binary triggers are restricted or banned in several states. Verify current law in your state before purchasing. See the binary trigger legal states article for the full state-by-state map.

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AR-15 or Pistol-Caliber Carbine?

Your host platform picks the trigger for you: there is no cross-platform binary, so the only real question is whether the AR-15 or a pistol-caliber carbine is the better host for the money.

If you are running an AR-15, the BFSIII AR-Essential is the buy at $299.99. It drops into a standard mil-spec lower with the factory pins and runs a standard bolt carrier group, so you are not buying a full-auto BCG or a heavier buffer just to make it cycle. The Fostech Echo AR-II reaches the same pull-and-release fire with HIPERFIRE-derived internals, but it requires a full-auto (M16-cut) carrier to run and costs $180 more at $479.99. Buy the Franklin unless you specifically want the Fostech. Planning the rest of the lower? The rifle builder lets you spec an AR-15 lower with a binary trigger selected before you spend a dollar.

If you are running a pistol-caliber carbine, Franklin makes a platform-specific BFSIII for each major host and they all sit at $449.99. There is no value tier here; the PCC binaries cost what they cost. The CZ Scorpion kit (CZ-C1) is the standout because it ships with an ambidextrous safety selector, so the install doubles as the factory safety fix most Scorpion owners do anyway. See where it fits in a full Scorpion upgrade path. The SP-S1 covers the Grand Power Stribog SP9 family (not the 10mm or 45 ACP variants); pair it with the rest of a Stribog accessory setup. The B&T-C1 covers the APC9, APC45, GHM9, GHM45, and SPC9 line.

Fitment and Compatibility Notes

Every BFSIII kit is locked to one host: the three PCC versions do not cross-fit, and only the AR-Essential and Fostech Echo drop into any mil-spec AR-15 lower. Match the trigger to your exact host before ordering, and check the spring-kit and buffer notes below, which trip up more buyers than the install itself.

BFSIII AR-Essential
FitsMil-spec AR-15 lowers (standard BCG)
Watch Out ForRange/competition only; not a defensive trigger
BFSIII CZ-C1 / CZ-S1
FitsCZ Scorpion EVO 3 and 3+
Watch Out ForNot compatible with the HB Industries Scorpion spring kit
BFSIII SP-S1
FitsMost 9mm Stribog SP9 (A1 / A3 / A3S)
Watch Out For10mm and 45 ACP Stribog variants not supported; not for HBI short-stroke buffer
BFSIII B&T-C1
FitsB&T APC9 / APC45 / GHM9 / GHM45 / SPC9 (incl. Pro and K)
Watch Out ForPremium price for a competition-only feature
Fostech Echo AR-II
FitsMil-spec AR-15 lowers (requires full-auto M16 BCG)
Watch Out ForNeeds a full-auto-cut carrier; $180 more than the AR-Essential
Binary Buying Snapshot
AR-15 Value Pick
$299.99BFSIII AR-Essential
PCC Kits
$449.99Scorpion / Stribog / APC9
Practical Rate
400-600RPMvs ~1,000+ for an FRT

The Verdict

Buy the BFSIII AR-Essential if you run an AR and confirm your state allows a binary. If both are legal where you live, buy a forced reset trigger instead.

The Franklin Armory BFSIII AR-Essential ($299.99) is the binary to buy for an AR-15: cheapest, drop-in, standard BCG. The CZ-C1, SP-S1, and B&T-C1 ($449.99 each) cover the Scorpion, Stribog, and APC9 families, and the Fostech Echo AR-II ($479.99) is the alternate AR pick. But the binary only makes sense as a purchase when your state restricts forced reset triggers and arguably leaves pull-and-release firing alone. Confirm that against your state's actual statute first. Where both are legal, the forced reset trigger is the smarter spend.

Complete Your Build

Sling, light, backup sights, and QD mounts, the upgrades most builders add first.

Open the builder
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  • ✓Dual QD swivels
  • ✓Convertible design
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Magpul QD Sling Swivel

  • ✓QD swivel
  • ✓Manganese phosphate
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BCM M-LOK QD Sling Mount

  • ✓M-LOK
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Magpul MBUS 3

  • ✓Impact-resistant polymer
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Blue Force Gear Vickers Sling

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Frequently Asked Questions

▶What are the best binary triggers?
The Franklin Armory BFSIII line dominates the binary trigger market and is the best choice for most platforms. The BFSIII AR-Essential ($299.99) is the best value for AR-15 builds; the BFSIII CZ Scorpion, Stribog SP-S1, and B&T-C1 ($449.99 each) cover the major pistol-caliber carbines. The Fostech Echo AR-II ($479.99) is the established AR-15 alternative. All fire one round on the pull and one on the release through a three-position safe/semi/binary selector.
▶Is a binary trigger better than a forced reset trigger?
Where both are legal, a forced reset trigger usually wins on price and cyclic rate. The cheapest functional FRT entry runs about $43 to $139 versus $299.99 and up for a binary, and FRTs reach roughly 1,000 to 1,200 RPM against the 400 to 600 RPM practical rate of a binary. The binary's advantage is legal: it requires a deliberate trigger pull and release for each pair of shots, so some state rate-of-fire statutes that target the forced-reset mechanism (a mechanical reset against a stationary finger) do not cleanly capture pull-and-release firing. In any state where both devices are legal, a forced reset trigger is the more cost-effective rate-of-fire option.
▶Can you legally buy a binary trigger?
Binary triggers are legal under federal law. The ATF does not classify them as machine guns because each shot requires a separate trigger function (pull or release), so there is no NFA registration, no Form 4, no tax, and no paperwork on the trigger itself. State law is where the restrictions live, and the list is contested and changing, so do not buy off a generic chart. The clearest bans are the assault-weapon states that name rate-of-fire devices by statute: California (multiburst trigger activators), Maryland (which names binary systems directly), Hawaii (triggers that fire on pull and release), Massachusetts (its 2024 trigger-modifier law names binary triggers), and New York. Colorado folds binary triggers into its dangerous-weapons prohibition under SB25-003. Connecticut, Delaware, Illinois, New Jersey, and Rhode Island ban or restrict them as well, and other states use broad rate-of-fire language that may or may not capture them. The full state-by-state list is in our binary trigger legal states breakdown, so read your own state's current statute, not a summary, before ordering.
▶Does a binary trigger require a special bolt carrier group?
It depends on the trigger. The Franklin Armory BFSIII AR-Essential is a true drop-in that runs a standard mil-spec AR-15 bolt carrier group with the factory pins, no full-auto carrier or heavier buffer needed. The Fostech Echo AR-II is different: it requires a full-auto (M16-cut) bolt carrier group to function, though not Fostech's older proprietary carrier. That extra requirement, on top of the higher price, is why the BFSIII AR-Essential is the easier AR-15 binary for most builds. By contrast, most forced reset triggers also call for a full-auto-rated carrier and an H2 or H3 buffer.
▶What is the difference between a binary trigger and a forced reset trigger?
A binary trigger fires one round when the trigger is pulled and a second round when it is released, giving two shots per full trigger cycle through a three-position selector. A forced reset trigger fires only on the pull, but a spring or cam mechanically forces the trigger forward against the shooter's finger after each shot, allowing faster follow-up pulls. FRTs reach higher cyclic rates but are a fundamentally different mechanism. Binary triggers are banned in fewer states than forced reset systems, which is the main reason a buyer in a rate-of-fire-restricted state would choose a binary over an FRT.
▶Which binary trigger fits the CZ Scorpion or Stribog?
Franklin Armory makes platform-specific BFSIII kits. The BFSIII CZ-C1 ($449.99) fits the CZ Scorpion EVO 3 and 3+ trigger group and ships with an ambidextrous safety selector. The BFSIII SP-S1 ($449.99) is a drop-in for most 9mm Grand Power Stribog SP9 models (A1, A3, A3S). The BFSIII B&T-C1 ($449.99) covers the B&T APC9, APC45, GHM9, GHM45, and SPC9 including the Pro and K variants. Each kit retains the factory pins.
AB
ABAuthor

Avid shooter with 10+ years of experience including competition shooting, and an associate member of the Professional Outdoor Media Association (POMA). Built 10+ AR-pattern rifles and several handgun platforms for home defense, competition, and suppressed night shooting.

10+ years shooting experienceCompetition shooterBuilt 10+ AR-pattern riflesAssociate member of the Professional Outdoor Media Association (POMA)

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