Del-Ton's budget direct-impingement AR-15 carbine. The Echo 316L is a stripped-down carbine built to mil-spec dimensions and designed for buyers who want a functional AR-15 at minimum cost. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm Capacity: 30 Year introduced: 2008, USA Weight: 6.3 oz Overall length: 32.25" Status: Active Intended use: Home Defense / Sporting