Mk 5 A/KT Stun Gun Prototype Salvage

Maybe it's time to put Mk 5 A/KT Stun Gun Prototype Salvage into the Tier V TAC Gear Challenge instead of Mk 4 A/KT Stun Gun... Having 4000+ Mk 4 A/KT Stun Gun Salvage and scrounging around for Mk 5 ...