The Seekins Precision SP15 in .450 Bushmaster applies billet-machined quality to the large-bore straight-wall hunting AR. Seekins' billet receivers and MCSR free-float handguard are standard. The 16-inch .450 BM barrel delivers straight-wall hunting capability at the premium tier. One of the most refined factory .450 Bushmaster AR-15s available, for hunters who want quality construction over budget pricing. Type: Rifle Action: Semi-Automatic Caliber: .450 Bushmaster Capacity: 5 Year introduced: 2019, USA Weight: 72 oz Overall length: 32.5" Status: Active Intended use: Hunting