Seekins Precision SP15 Billet with 16-inch barrel and fully billet receiver set. Enhanced fitment and aesthetics over forged receiver builds. Type: Semi-Auto Rifle Action: Semi-Automatic Caliber: 5.56x45mm Capacity: 30 Year introduced: 2015, USA Weight: 65.5 oz Overall length: 33" Status: Active Intended use: Precision/General Purpose