Franklin Armory / HKP HK MP5K Binary Trigger Group – 2 Round Engraved Binary Housing

$1,399.95 - $1,499.95
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Franklin Armory BFSIII HK-C1 –MP5K  Trigger Group 

3 Position 2 round burst style Engraved Pictograph – HK Binary Trigger Group 

Our latest and greatest Binary trigger group freshly delivered with a factory HK German housing that was professionally engraved and painted with a 2 round burst pictograph to match the Franklin Armory binary trigger pack. All 3 positions line up 100% with our own Binary selector levers. These units come completely assembled and ready to drop onto your reciever in a matter of minnutes. Truly the best option for your prized MP5K / SP5K or clone. Only a few on hand so get them while you can.

Product Includes:

  • Franklin Armory BFSIII HK-C1 Trigger Pack
  • HK German – 3 Position with engraved Pictogram Housing – Push pin 
  • 9mm Ejector Lever – German 3rd Generation
  • Ejector Axle Pin
  • Ejector Spring

The BFSIII™ for HK is a 3-Position Trigger.

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.

1 Review Hide Reviews Show Reviews

  • 5
    FA HKP binary trigger group

    Posted by Joe P. on 31st Jan 2024

    Great product. Expertly designed. Ran flawlessly on all pushpin clones tested. Great selectors and precise alignment to the unique pictogram. A solid trigger group!

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