sentences:  The .22 LR variant feeds from a proprietary 10 round magazine, and functions using a traditional straight blowback operating system rather than the Super V delayed system.The Canadian (and some American) civil market versions only come with the blocked 10-round magazines rather than the full capacity magazines.Like the Law Enforcement / Military SMG models, the civilian model Vectors can be converted to chamber and fire other calibers if the lower receiver groups are changed.