Compression rounds are a revolutionary technology that were first deployed by the Shadow Series Weapon System. Bullets are compacted into the magazine using heat compression. When used, the bullet flash-expands in the chamber of the weapon just before being shot. Magazines with compression rounds can carry up to 500 rounds in what would normally be a 30 round clip. Advanced chemicals, alloys, and weapons systems have given compression round magazines a reputation for being state of the art ammunition.