The Diamondback DB15E is an enhanced version of the DB15 with an M-LOK free-float handguard, mid-length gas system, and an upgraded trigger group. Targets buyers who want a step up from the standard DB15 without a premium-brand price. Type: Semi-Auto Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2017, USA Weight: 6.4 oz Overall length: 32.5" Status: Active Intended use: Home Defense, Hunting, Competition