Aero Precision APRA500104A Atlas S-One Handguard with M-Lok AR15 Rifle 6061-T6 Aluminum Black Hard Coat Anodized12" The Atlas S-One is machined from 6061-T6 aluminum, and designed with size and weight in mind, which provides the perfect handguard for your lightweight build. Aero's proprietary Atlas attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability. This 12" model has a black hardcoat anodized finish and M-Lok. Type: Handguard Firearm Type: Rifle Firearm Model: AR-15 Material: 6061-T6 Aluminum Finish: Black Hard Coat Anodized Features: M-LOK