Shop › MFT TEKKO METAL AR15 INT RL SYSTM MFT TEKKO METAL AR15 INT RL SYSTM $99.99 Mission First Tactical Tekko Metal AR Carbine Integrated Rail System, Replaces Factory Handguard, 7" Drop In Integrated Rail System, Black TMARCIRS Add To Cart Added! Mission First Tactical Tekko Metal AR Carbine Integrated Rail System, Replaces Factory Handguard, 7" Drop In Integrated Rail System, Black TMARCIRS