Franklin BFSIII HK-C1 Binary Trigger Firing HKv91
Updated August 6, 2026
| Lot number | 3893 |
| Auction | TRIGGER SHACK ARSENAL CO. |
| Date | August 9, 2026 at 5:00 PM EDT |
| Auction house | Trigger Shack Llc. |
| Location | Etobicoke, ON |
Franklin Armory BFSIII HK-C1 Binary Firing Trigger Firing System For HK91 HK93 HKMP5Platform - Curved Trigger conditions new Franklin Armory BFSIII® HK-C1 is a 3-position binary firing system designed for HK-pattern firearms. In Binary mode, one round is fired on trigger pull and one round on trigger release, allowing extremely fast split times while remaining semi-automatic. Ideal for tactical and competition use, it enables tighter double-tap shot placement and faster follow-up shots. 3-Position Selector: Safe / Semi / Binary Fires 1 round on pull + 1 round on release (Binary mode) Approx. 4.5 lb trigger pull Curved trigger Ambidextrous safety selector Selector fits most 2- and 3-position trigger housings Compatible with SP5K housings Compatibility: Fits most HK 91, HK 93, and MP5 variants & clones Some firearms may require additional fitting Not Included: Trigger housing Ejector Ejector pin Ejector spring MFG PRODUCT #:05-50000-BLK Important Notices: The buyer is responsible for verifying compliance with all local and state laws before bidding on this item.” No refunds on prohibited items Professional installation by a qualified gunsmith is recommended
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