This is a custom built AR-450. It has an Anderson manufacturing billet aluminum lower receiver with standard Anderson lower parts kit. It has a bear creek arsenal 16" parkerized heavy barrel. Comes with one ruger 450 metal magazine. Has a 3-9x50mm vortex straight wall BDC scope. The gun shoots and cycles very good. The rifle is in like new condition, only ran about 30 rounds through it. Asking $650 or trade.