Daniel Defense MK12 Mod H replicates the U.S. SOCOM Mk 12 Mod 0 Special Purpose Rifle configuration with an 18-inch 1:8 twist stainless steel barrel, free-float URX rail, and KAC-style suppressor adapter. Purpose-built for precision designated marksman roles. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2015, USA Weight: 104 oz Overall length: 36.5" Status: Active Intended use: Military, Precision, Law Enforcement, Designated Marksman