Sons of Liberty Gun Works EXO3 Rail 13in Includes Aluminum QD Socket Black. A super tough new rail from Sons of Liberty designed to meet demanding duty requirements while remaining light and affordable. Specifications for Sons of Liberty Gun Works EXO3 Rail: Manufacturer: Sons of Liberty Gun Works Color: Black Finish: Type III Anodizing Fabric/Material: 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Handguard Length: 13 in Gun Rail: M-LOK Weight: 11.9 oz Hand: Ambidextrous Length: 13 in Features of Sons of Liberty Gun Works EXO3 Rail: MLOK at 1 3 6 9 and 11 O'CLock Continuous Top Rail at 12 O'Clock Aluminum Barrel Nut with Steel Hardware Ships with Aluminum M-LOK QD Socket and 5 Slot Aluminum M-LOK Rail section Package Contents: Sons of Liberty Gun Works EXO3 Rail Aluminum QD Mount QD Socket Sons of Liberty Gun Works EXO3-13: EXO3 Rail 13in Includes Aluminum QD Socket Black