Preferred way to deliver UWP app without Windows Store

Yes of course it is possible to create an installer for your app, in Visual Studio go to "Project\Store\Create App Packages..." menu and when it will ask you if you want to upload the packages to Windows Store simply click No.

This will generate the app packages plus an easy to run powershell script that when run will install the app (or upgrade to a new version if there was a previous one already installed)