Binary Trigger Pack – Franklin Armory


In position 3 it will fire 1 round on Pull and 1 round on Release. This makes it the fastest semi-automatic trigger on the market.

The BFSIII™ is ideal for Tactical and Competition use. The BFSIII™ provides greatly reduced split times between rounds and the ability to place two separate shots into a tighter group.


Trigger Operation:

  • Position 1 – Safe –Will not fire.
  • Position 2 – Semi – Fires 1 round per pull.
  • Position 3 – Binary – Fires 1 round on pull and 1 round on release.


  • A trigger pull around 4.5 pounds.
  • Ambidextrous Safety Selector.
  • Safety Selector will fit in most two and three position trigger housings.
  • Works in SP5K housings.

Additional Parts Needed

These parts are not included.

  • HK German – SEF Trigger Housing – Clipped and Pinned
  • 9mm Ejector Lever – German 3rd Generation
  • Ejector Axle Pin
  • Ejector Spring


  • HK MP5 – and variants
  • HK MP5K – and variants
  • HK 93 – and variants
  • HK 91 – and variants

More details…

Out of stock

SKU: HKP-18434

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