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The Aero Precision Handguard lineup now includes the ATLAS R-ONE, a lightweight handguard made from 6061-T6 Aluminum and designed with size and weight in mind. The ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while providing strength and stability. KeyMod and M-LOK profiles are available in 12" and 15" lengths, with 7" and 9" options coming soon. The ATLAS system features 2 tapered locking nuts for even clamping pressure across a custom barrel nut with a turnbuckle screw, and a ratcheting detent secures it during installation. The handguard has a full top picatinny rail and a quick disconnect sling socket at the 3, 6, and 9 o'clock positions, and is compatible with low profile gas blocks. The inside diameter is 1.3" and the outside diameter is 1.5". It is compatible with mil-spec AR15 upper receivers and barrels, but may not be compatible with billet upper receivers due to indexing tabs. The keymod handguards weigh 5.12 oz (7"), 5.92 oz (9"), 7.84 oz (12"), and 8.96 oz (15"), while the M-LOK handguards weigh 5.22 oz (7"), 6.03 oz (9"), 8 oz (12"), and 9.07 oz (15"). Mounting hardware weighs 4.72 oz and is the same across all options. ATLAS Handguards are designed to match seamlessly with the M4E1 Threaded Upper Receiver and are compatible with any Mil-Spec AR-15 upper receiver. Combining them as a combo saves money.