M4E1 Threaded Complete Upper 10" .300 Blackout Barrel 9" M-LOK ATLAS S-ONE Handguard - FDE Cerakote - APAR700312M4

This complete upper includes the new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. 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.