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Daniel Defense MK18 Rail Interface System II, RIS II
$582.00 $542.00 Save $40.00
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TK11069's Review of Daniel Defense MK18 Rail Interface System II, RIS II

My first Daniel Defense experience was installing the DD MFR AR-15 M-Lok 15" Handguard on my 18" AR. I liked it so much that I bought the DD RIS II for my 11.5" SBR. The barrel nut and bolt-up plates are the same. There are slight differences from there as the RIS is a two piece. What I did not like is that the RIS is packaged fully assembled and you have to take it apart first. DO NOT try to remove the bolts before separating the two halves held by screws!

A lot of rails are thinner and streamlined whereas this rail is both turn of the century retro and perfect for MK18 II builds.
Pros:
  • Quality
  • Durabilaty
  • Ease of install
Cons:
  • price $$$ - unfortunately good things come at a price.
Best Used for:
  • clone build
Would Recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2026-05-01 UTC.