Barska 12 in AR Quad Rail w/ Key Mold System KeyMod Mounting Slots Free Floating Design Black. These KeyMod slots provide almost limitless combination of mounting points without the extra weight associated with similarly sized Picatinny rails. The KeyMod Slots are located at the 3 6 and 9 o'clock positions and the Picatinny top rail has been designed to fit seamlessly with a mil-spec upper receiver. This KeyMod Handguard is ideal for use with low-profile gas blocks on carbine mid or rifle-length gas systems. Specifications for Barska 12 in AR Quad Rail w/ Key Mold System KeyMod Mounting Slots: Manufacturer: Barska Color: Black Finish: Hard Coat Anodized Fabric/Material: T6 Aluminum Gun Make: AR Platform Gun Type: Rifle Handguard Length: 12 in Handguard Type: Free-Float Handguard Style: Quad Rail Gun Rail: KeyMod Weight: 12 oz Included Accessories: Standard Mount Type: KeyMod Quantity: 1 The 12 inch KeyMod Handguard by Barska is a free floating handguard that utilizes the KeyMod accessory attachment system for increased weight savings modularity and ergonomics. These KeyMod slots provide almost limitless combination of mounting points without the extra weight associated with similarly sized Picatinny rails. The KeyMod Slots are located at the 3 6 and 9 o'clock positions and the Picatinny top rail has been designed to fit seamlessly with an upper receiver. This KeyMod Handguard is ideal for use with low-profile gas blocks on carbine mid or rifle-length gas systems.