Daniel Defense DDM4 V7 chambered in .300 Blackout with 16-inch barrel and M-LOK handguard. Optimized for suppressed use with DDM4 reliability. Type: Semi-Auto Rifle Action: Semi-Automatic Caliber: 300 AAC Blackout Capacity: 30 Year introduced: 2017, USA Weight: 64.5 oz Overall length: 32" Status: Active Intended use: Suppressed/General Purpose