The Del-Ton Echo 316H is the heavy-barrel variant of the Echo 316, featuring a government-profile barrel for improved heat dissipation during sustained fire. The 16-inch chrome-lined heavy-profile barrel is paired with a carbine-length gas system and standard M4 furniture. The H suffix distinguishes this from the standard Echo 316 and the lightweight 316L models. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2014, USA Weight: 68 oz Overall length: 32.5" Status: Active Intended use: Home Defense, Target Shooting, Patrol Rifle