ATLAS The new 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 providing positive registration during installation. By design, the even pressure of the ATLAS system avoids distortion of the handguard often seen with current applications during installation. All hardware mounting parts are included with the purchase of an ATLAS Handguard. M-LOK Handguard Weights: 7" - 5.22 oz / 9" - 6.03 oz / 12" - 8 oz / 15" - 9.07 oz Mounting Hardware Weight: 4.72 oz (same across all ATLAS Handguard options)