Spikes Tactical ST15 with 16-inch chrome-lined barrel, carbine-length gas system, and Spikes's proprietary lower receiver featuring their distinctive spider logo. Spikes is known for manufacturing quality mil-spec receivers and complete rifles with distinctive cosmetic treatments. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2007, USA Weight: 98 oz Overall length: 32.5" Status: Active Intended use: Tactical, Sport Shooting, Home Defense