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AR-15 ATLAS S-ONE M-LOK free-floating slim line handguards by Aero Precision are machined from 6061-T6 aluminum, with size and weight in mind to cater to lightweight MSR builds. The handguard's slim profile doesn't compromise on the required strength and stability. The new Aero Taper Lock Attachment System (ATLAS) that the AR-15 ATLAS S-ONE slim line handguards use is functional and has an attractive appearance. The system features two mirrored tapered locking nuts that distribute even clamping pressure across a custom barrel nut with a turnbuckle screw. AR-15 ATLAS S-ONE slim line handguards are available in Black and FDE and come with a front and rear picatinny rail, indexing grooves in the 12 o'clock position for positive grip control, and have a reduced weight by removing the center of the top rail. Additionally, the handguards come with all necessary mounting hardware. Aero Precision rail lengths include the point of contact at the receiver till the end of the last picatinny slot at the muzzle. The handguards are available in four sizes: 7"-7.25", 9"-9.19", 12"-12.56", and 15"-14.94" and have an inner diameter of 1.3" and outer diameter of 1.5".