Daniel Defense M4A1 FSP Rail Interface System (RIS) II - 01-004-08030-006 Black
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Daniel Defense
Overview
The Daniel Defense M4A1 FSP Rail Interface System (RIS) II is a durable handguard designed specifically for the AR-15 platform, featuring a length of 9.55 inches. With its Picatinny mounting interface, builders can easily attach a variety of accessories to enhance the performance and functionality of their firearm. This handguard is commonly found in builds utilizing a rifle-length gas system and chambered in 5.56 NATO, making it a practical choice for those looking to customize their setup.
Specifications
Daniel Defense M4A1 FSP Rail Interface System (RIS) II - 01-004-08030-006 Black
October 2026 on GunPartPicker
Daniel Defense M4A1 FSP Rail Interface System (RIS) II - 01-004-08030-006 Black ranked #54 of the 290 handguards builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #63 of the 879 handguards builders have added.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today both retailers we track have it in stock. Prices barely moved in October 2026, holding around $542, with no real sale all month. Buying today, the lowest price is $542 at Classic Firearms, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all builds →Builds in the community that include the Daniel Defense M4A1 FSP Rail Interface System (RIS) II - 01-004-08030-006 Black
| Build | Parts | Total |
|---|---|---|
 | 15 | $4135.16 |
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