Aero Precision's M4E1 Enhanced features improved ambi controls, a Magpul MOE handguard, and enhanced furniture compared to the base M4E1. Targets the mid-tier complete AR buyer who wants drop-in quality without a full custom build. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2017, USA Weight: 100 oz Overall length: 32.5" Status: Active Intended use: Home Defense, Competition, Service