Ace 1 Arms Tactical Outer Barrel Set for Marui ( TM ) and WE System G34 / 35C ( SV ) - Finish: Bead-blasted & Hard Coat Andoizing - Mount: +14mm Clockwise Feature: - Special Design Inner Barrel for Ace 1 Arms OSP Style Range Up Mock Suppresser - Inside O-ring Design for stabilize inner barrel Kits Included: - Thread Tactical Outer Barrel - Accurate 6.01mm Inner Barrel