Inclusion Criteria:  Acute ischemic stroke Treatment (arterial puncture) can be initiated 2.1. Within 6 hours of last seen well (LSW) OR 2.2. Within 6 to 24 hours of LSW AND CT Criteria: Evidence of a hypoperfusion-hypodensity mismatch (Absence of hypodensity on the noncontrast CT within ≥ 90% of the area of the hypoperfused lesion on perfusion CT) MRI Criteria: Evidence of a diffusion-hyperintensity mismatch (Absence of hyperintensity on fluid-attenuated inversion recovery (FLAIR) imaging within ≥ 90% of the area of the diffusion weighted imaging(DWI) lesion) Isolated medium vessel occlusion (i.e. an occlusion of the co-/non-dominant M2, the M3/M4 segment of theMCA, the A1/A2/A3 segment of the ACA or the P1/P2 segment of the PCA) confirmed by CT or MRIAngiography National Institute of Health Stroke Scale (NIHSS) Score of ≥ 4 points or symptoms deemed clearly disabling by treating physician (i.e. aphasia, hemianopia, etc.) Informed Consent as documented by signature or fulfilling the criteria for emergency consent/ deferral consent Agreement of treating physician to perform endovascular procedure  Exclusion Criteria:  Acute intracranial haemorrhage Patient bedridden or presenting from a nursing home In-Hospital Stroke Known (serious) sensitivity to radiographic contrast agents, nickel, titanium metals or their alloys Foreseeable difficulties in follow-up due to geographic reasons (e.g. patients living abroad) Pregnancy or lactating women. A negative pregnancy test before randomisation is required for all women with child-bearing potential. Known history of arterial tortuosity, pre-existing stent, other arterial disease and/or known disease at the arterial access site that would prevent the device from reaching the target vessel and/or preclude safe recovery after EVT Severe comorbidities, which will likely prevent improvement or follow-up Radiological confirmed evidence of mass effect or intracranial tumour (except small meningioma) Radiological confirmed evidence of cerebral vasculitis Evidence of vessel recanalization prior to randomisation Participation in another interventional trial