The genesis of modular free float rails has arrived. Building off of the TRX Extreme design that revolutionized rail based handguards; the Alpha Rail utilizes a new low-profile locking mechanism, which offers unparalleled strength and stability. With built-in legendary Troy spring loaded front Battlesight, unlimited mounting options, and greater heat dispersion the Alpha Rail once again sets a new industry standard in modular free float rail design. - 11" - Comes with three small detachable rails and all mounting hardware - Built-in spring loaded front folding M4 style Battlesight - Machined from 6061-T6 hardened aircraft aluminum and finished in MIL-SPEC Type III Hard Coat Anodizing - Works with standard AR15/M16 barrel nut - Made in the U.S.A. - Black