Franklin Armory BFSIII HK-C1 Binary Trigger — HK 91/93/MP5

Description

The Franklin Armory BFSIII HK-C1 is a 3-position firing system designed for use in compatible HK 91/93 and MP5-style platforms. In its third position the trigger fires one round on the pull and one round on the release, providing reduced split times for controlled follow-up shots. The assembly includes an ambidextrous safety selector and is finished in black with steel construction.

Key Specifications

• The trigger provides 3-position operation: Position 1 is Safe, Position 2 is Semi, Position 3 is Binary (one round on pull and one round on release).
• The trigger pull measures approximately 4.5 pounds as stated by the manufacturer.
• The safety is an ambidextrous safety selector for use from either side of the receiver.
• The safety selector will fit in two and three position trigger housings (will not work with ambidextrous housings, per manufacturer note).
• The product frame material is listed as Steel with a Black finish color.
• The trigger assembly is described as fitting most HK 91, 93 & MP5 variants and clones, though some firearms may require additional fitting.
• The package does not include the trigger housing, ejector, ejector pin, or ejector spring.
• The listing weight is 0.65 (manufacturer attribute).
• The unit is intended for tactical and competition use where reduced split times are desired.

This trigger system offers a straightforward mechanical solution for shooters seeking faster controlled follow-up shots on HK 91/93/MP5-style platforms. The BFSIII’s three-position design and ambidextrous selector make it suitable for both right- and left-handed operation, while the stated trigger pull and steel construction reflect the manufacturer’s intended balance of feel and durability. Installation can require fitting by a qualified gunsmith; consider professional installation and training before use.