Aero Precision M4E1 Enhanced complete rifle with 16-inch barrel. Enhanced furniture package. Mid-length gas system. Upgraded stock, grip, and trigger over base M4E1. Type: Rifle Action: Semi-Auto Caliber: 5.56 NATO Capacity: 30 Year introduced: 2018, USA Weight: 60.8 oz Overall length: 32.5" Status: Active Intended use: Duty, Defense, Patrol