reports that some major retail chains have been running out of Google Nexus 7 tablets on the device’s first day of availability. According to Reuters, customers have already ripped all the Nexus 7 tablets out of GameStop’s inventory while both the Sam’s Club and Walmart websites list the device as out of stock as well. While GameStop would not specify the exact number of Nexus 7 tablets it had ordered, a company spokesman told Reuters that it “blew through the first two allotments,” meaning GameStop won’t have any more Nexus 7s to sell until a third allotment becomes available in August.