The CMMG MK47 Mutant in .458 SOCOM uses the MK47 platform's larger lower receiver to provide improved bolt stability for the large-diameter SOCOM cartridge while retaining standard AR-15 bolt carrier group dimensions. The result is more reliable feeding than standard AR-15-based SOCOM builds. Type: Rifle Action: Semi-Automatic Caliber: .458 SOCOM Capacity: 7 Year introduced: 2017, USA Weight: 96 oz Overall length: 34" Status: Active Intended use: Hunting, Home Defense