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
Build history on GunPartPicker
Builders have been adding the Daniel Defense M4A1 FSP Rail Interface System (RIS) II - 01-004-08030-006 Black to their builds on GunPartPicker since March 2026. All time, it ranks #106 of the 678 handguards builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today both retailers we track have it in stock. The best price crept up from $516 to $542 over August 2026. Buying today, the lowest price is $542 at Classic Firearms, above August's low of $516, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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Frequently Built With
The part most often added in each category by the 5 builds that include this one
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Palmetto State Armory "I Stand" AR-15 Stripped Lower Receiver - 516446970
ODIN Works 20" 6.5 Grendel Rifle-Length Barrel, w/ BCG & Gas Block B-6.5-20-R-TG-BCG
CMMG AR-15 Forward Assist KIT
Aero Precision AR-15 Ejection Port Cover Assembly
Aero Precision Gas Tube, Carbine Length - Melonite
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 1 →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 | $4134.33 |
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