The American Built Arms MZ in 5.45x39mm is a US-manufactured AR-platform rifle accepting AK-74 magazines through a dedicated lower receiver. ABA positions the MZ as a domestic alternative to imported AK-74 variants for 5.45x39mm shooters who prefer AR ergonomics. Type: Rifle Action: Semi-Automatic Caliber: 5.45x39mm Capacity: 30 Year introduced: 2014, USA Weight: 72 oz Overall length: 32.5" Status: Active Intended use: Recreation, Hunting