Very Nice FF Rail!

I purchased the 13" FDE version in September. The install was fairly easy. Had to loosen and tighten the mounting screws to perfectly align the rail with the upper rail. I have put about 300 rounds Through the upper. The rail works great. It also has enough clearance for the G Super Gas Block with little chance of contact when firing. The M LOK slots have had no trouble mounting M LOK accessories. The slightly larger OD at 1.7" reduces heat build up in the rail over the usual slim 1.5" of most slim rails.