All Mk II Disruptor Ship Weapons, except the Dual Cannons and Dual Heavy Cannons, sold via the PvP Weapons Vendor have a requirements of "Lieutenant Commander" (T2) instead of no requirement. The PvE Weapons vendor does not offer Mk II Disruptor weapons other than the dual or heavy cannons.
Disruptor Cannon Mk II
Dual Disruptor Beam Banks Mk II
Disruptor Beam Array Mk II
Disruptor Turret Mk II