San Tan Tactical Series Valor 15in M-LOK Rail Black Medium. Machined from aircraft-grade aluminum and finished in a tough black anodize the Valor rail features M-LOK attachment slots at 3 6 and 9 o'clock with a full-length Picatinny top rail. Built with standard anti-rotation tabs and lock retention it gives custom AR builders a lightweight rock-solid handguard that won't shift under hard use. Specifications for San Tan Tactical 1836 Series Valor M-LOK Rail: Manufacturer: San Tan Tactical Color: Black Fabric/Material: 6061-T6 Aircraft Grade Aluminum Gun Make: AR Platform Gun Type: Rifle Handguard Type: Free-Float Handguard Style: M-LOK w/ Top Picatinny Rail System Gun Rail: M-LOK Features of San Tan Tactical 1836 Series Valor M-LOK Rail Free-float design prevents barrel deflection and increases accuracy Lightweight and rigid aircraft-grade aluminum construction Standard Lock Retention System with anti-rotation lockup Full-length 1913 Picatinny top rail M-LOK accessory mounting slots Durable hard-coat black finish Package Contents: San Tan Tactical 1836 Series Valor M-LOK Rail barrel nut & mounting screws San Tan Tactical STT-1836V-15R-BLK: 1836 Series Valor 15in M-LOK Rail Black Medium