The Aero Precision Atlas S-One Handguard is machined from 6061-T6 Aluminum. The S-ONE line of handguards are designed with size and weight in mind, providing the perfect handguard for 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. ATLAS Handguards are designed to match seamlessly with M4E1 Threaded Upper Receivers. Additionally, they are compatible with any Mil-Spec AR-15 upper receivers as well. However, they may not be compatible with billet upper receivers due to indexing tabs. The Aero Taper Lock Attachment System (ATLAS) is both functional and aesthetically pleasing. It features 2 mirrored tapered locking nuts that provide evenly distributed clamping pressure across a custom engineered barrel nut with use of a turnbuckle screw. A ratcheting detent further secures the design while...