The FCPC Mini Cobra Buckle sold separately to add to your FCPC V5 to have both shoulder straps quick detach.
COBRA® FM – AustriAlpin
FCPC MINI COBRA BUCKLE – GSS Gear FWB
PEW TACTICAL FERRO STYLE 3AC Cobra Buckle Kit for FCPC V5
FCPC V5 Base – GSS Gear FWB
FCPC Mini Cobra Buckle – FERRO CONCEPTS
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Ferro Concepts - Chesty Rig Mini Harness
FCPC V5 PLATE CARRIER – OP Tactical
Jual Safariland UBL Universal Belt Loop With QLS Quick Locking
Ferro Concepts FCPC V5 Base Plate Carrier – Legit Kit