- This item cannot be shipped to California under California state law (SB 1263).
The M4A1 RIS II FSP rail assembly keeps Daniel Defense's genuine SOCOM‑contract quad‑rail design while accommodating a front sight post, for rifles or builds that specifically need to retain a fixed front sight rather than running an optic‑only configuration. The same free‑floating, Bolt‑Up‑System rigidity as the standard RIS II, just cut for FSP compatibility.
RIS II M4A1 FSP ASSEMBLY BLACK 01‑004‑08030‑006
- Model: M4A1 RIS II FSP Rail Assembly
- Finish: Black
- Overall Length: 12.25"
- Weight: 17.1 oz
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