It looks like you’re referencing a specific file naming convention often found on file-sharing or torrent sites. If you are looking for a review of the movie
Usually .MKV (which supports multiple audio/subtitle streams) 300 Dual Audio 1080p Download REPACK
But before you click that magnet link, it is critical to understand what this technical jargon actually means, the massive risks involved in pursuing a "REPACK," and the legitimate ways to watch the battle of Thermopylae in glorious high definition. It looks like you’re referencing a specific file
While "repack" is a term often used in unofficial circles, you can find high-quality 1080p and 4K versions of 300 with multiple audio options through legitimate services: 300 Dual Audio 1080p Download REPACK