The Aero Precision M4E1 PRO rifle was built for the end user. A seamless integration of ambidextrous controls paired with robust componentry brings the M4E1 PRO Rifle into a class of its own within the M4E1 lineup. The M4E1 PRO Lower Receiver features a mirrored set of controls allowing for both convenient and intuitive manipulation of the ambidextrous safety, magazine release, and bolt catch. At the heart of this rifle is a Ballistic Advantage Cold Hammer Forged barrel wrapped in an Aero Precision MOD 4 Handguard bringing rigidity to the table in a slimline form factor.