This beautiful rifle from the Midwest fills the need for an affordable AR that you can trust to be built right. Chambered in 450 Bushmaster, these Great Lakes Firearms AR rifles feature a 18" barrel in your choice of a beautiful 416r stainless steel or an ultra-smooth 4150 CRMOV black nitride finish with a 1:24 twist. The heavy barrel incorporates a mid-length gas system, with 0.750 Gas Block. The barrel is threaded in 9/16x24 and is fitted with a ported compensator. Each barrel is surrounded by a 15.25" 6061 aluminum M-Lok handguard with a full-length picatinny rail on top, allowing you to attach the different accessories you may require. While this rifle features a 7075 Oversized Upper Receiver, it weighs in at only 6.4lbs.