Aero Precision M4E1 223 Rem/5.56 NATO Complete Upper, 16" Barrel, 1:7 Twist, ATLAS S-ONE Handguard - Black

This complete upper includes the ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. The proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.