The Franklin Armory SP-S1 BFSIII Binary Firing System is a three-position trigger kit designed for the Stribog platform. It provides safe, semi-automatic, and binary trigger positions, with compatibility listed for most Stribog A1, A3, and A3S models.

Key Specifications

• The trigger provides three positions: Safe, Semi, and Binary.
• Safe mode is identified as Position 1 and is designed not to fire.
• Semi mode is identified as Position 2 and fires one round per pull.
• Binary mode is identified as Position 3 and fires one round on pull and one on release.
• The release cycle can be canceled by moving the selector out of Binary mode while holding the trigger back.
• Compatibility is listed for most Stribog A1, A3, and A3S models.
• The listed finish color is Black.
• The listed product weight is 0.427.
• The kit features a positive reset on the release phase.
• Installation may require a gunsmith.

The SP-S1 kit offers Stribog owners a distinct three-position trigger configuration with clearly defined operating modes and a positive release-phase reset. Its platform-specific design makes it a focused upgrade for applicable Stribog builds, subject to local laws and proper installation by a qualified professional when required.

Binary Firing System products may be restricted from civilian sale in CA, CT, DC, DE, FL, HI, IA, IL, MA, MD, MN, NJ, NY, RI, and WA. Never alter internal components. Improper installation, use, or tampering may create unsafe operation and void the warranty. Users should obtain qualified training after installation.

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