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Q&A for Daniel Defense Rail Interface System Ris III FSP — 4 Questions & 4 Answers

Name Daniel Defense Rail Interface System Ris III FSP
$582.00 $542.00 Save $40.00
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Q
Russell Henry, member, from TX, United States, asked on June 09, 2024

Will this work with a mid length piston adjustable gas system. And dos it come with a barrel nut?

A
Answered by Elliott Jones, member, from AL, United States, on May 07, 2026

No to Both

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Q
Andy Flores, member, from CA, United States, asked on April 04, 2024

Does this come with the barrel nut in the package?

A
Answered by Elliott Jones, member, from AL, United States, on May 07, 2026

No. It’s for a Delta ring setup.

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Q
Knotts, member, from KY, United States, asked on March 28, 2024

Would this rail system attach to or be compatible with the Ruger 556 carbine with the fixed A2 sights? Thank you!

A
Answered by Elliott Jones, member, from AL, United States, on May 07, 2026

Yes. Just make sure the barrel is long enough. Length says 13”. So 13.5 or longer barrel will work

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Knotts, member, from KY, United States, asked on April 06, 2024

Would I have any problems mounting on a Ruger 556 carbine?

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Last updated 2025-11-12 UTC.