The Spikes Tactical ST-15 in .458 SOCOM is a complete AR-15 built on Spikes' billet upper and lower receiver set with a 16-inch chromoly barrel and M-LOK handguard. Spikes Tactical's reputation for quality receivers and novelty lower designs carries over to their SOCOM offering. Type: Rifle Action: Semi-Automatic Caliber: .458 SOCOM Capacity: 7 Year introduced: 2012, USA Weight: 80 oz Overall length: 34" Status: Active Intended use: Hunting, Home Defense