The Seekins Precision SP10B in .308 Winchester with 20-inch barrel is the long-range configuration of the SP10B platform. The 20-inch stainless barrel and rifle-length gas system extract maximum .308 ballistic performance. Seekins' billet receivers, MCSR free-float handguard, and adjustable gas block provide the refined long-range .308 AR platform the brand is known for. Designed for precision rifle competition and long-range hunting. Type: Rifle Action: Semi-Automatic Caliber: 308 Winchester Capacity: 20 Year introduced: 2016, USA Weight: 118 oz Overall length: 40.5" Status: Active Intended use: Precision Rifle, Hunting, Long-Range Shooting