The FCPC Mini Cobra Buckle sold separately to add to your FCPC V5 to have both shoulder straps quick detach.
Ferro Concepts FCPC V5 Base – Tactical Distributors
Coolguysurplus - Pouches for sale DBT RG Vertical Gas Mask Pouch
Ferro Concepts 3AC Cobra Buckle Kit
RD TACTICAL FCPC AVS SPC Vest Quick Release Buckle Metal Cobra Buckle Compatible with FERRO V5
FCPC Mini Cobra Buckle – FERRO CONCEPTS
Looking for replacement plate carrier : r/QualityTacticalGear
Ferro Concepts Adapt Plate Carrier Back Panel - Double Pouch
Ferro Concepts FCPC Mini Cobra Buckle – Offbase Supply Co.
RD TACTICAL FCPC AVS SPC Vest Quick Release Buckle Metal Cobra