FREE SHIPPING & FREE RETURNS*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Daniel Defense M4A1 Rail Interface System RIS II Up to $12.50 Off — Free 2 Day Shipping w/ code 2DAYAIR — 2 models

Special offer available for this product. Click here to see!
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Flat Dark Earth, DD-8001
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
1 of 13 images
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Flat Dark Earth, DD-8001
2 of 13 images
Daniel Defense M4A1 Rail Interface System II, Flat Dark Earth, DD-8001
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
3 of 13 images
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
4 of 13 images
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
5 of 13 images
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
6 of 13 images
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
7 of 13 images
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
8 of 13 images
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
9 of 13 images
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
10 of 13 images
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
11 of 13 images
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
12 of 13 images
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK
13 of 13 images
Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK

Tap Tap to Zoom

Government Export Restriction Government Export Restriction
You May Also Like
Blazin' Deal TRYBE Defense AR-15 M-LOK 12in Extra Lightweight Handguard w/ Cut Away Rail, Black, 12 Inch, HDG12CR-BL
TRYBE Defense AR-15 M-LOK 12in Extra Lightweight Handguard w/ Cut Away Rail, Black, 12 Inch, HDG12CR-BL
(69)
$139.99 $94.99 Save Up to $75.00
Blazin' Deal TRYBE Defense AR-15 M-LOK 12in Extra Lightweight Handguard w/ Cut-Away Rail, Flat Dark Earth, 12 Inch, HDG12CR-FDE
TRYBE Defense AR-15 M-LOK 12in Extra Lightweight Handguard w/ Cut-Away Rail, Flat Dark Earth, 12 Inch, HDG12CR-FDE
(69)
$149.99 $74.99 Save Up to $75.00
Blazin' Deal TRYBE Defense AR-15 M-LOK 12in Lightweight Handguard w/ Full Rail, Black, 12 Inch, HDG12FR-BL
TRYBE Defense AR-15 M-LOK 12in Lightweight Handguard w/ Full Rail, Black, 12 Inch, HDG12FR-BL
(56)
$139.99 $99.99 Save Up to $75.00
Blazin' Deal TRYBE Defense AR-15 M-LOK 12in Lightweight Handguard w/ Full Rail, Flat Dark Earth, 12 Inch, HDG12FR-FDE
TRYBE Defense AR-15 M-LOK 12in Lightweight Handguard w/ Full Rail, Flat Dark Earth, 12 Inch, HDG12FR-FDE
(56)
$149.99 $74.99 Save Up to $75.00
Free 2 Day Shipping TRYBE Defense Magnite Go Fast Ultra Lightweight Handguard, Full Top Rail, M-LOK, Black, 12in, MGHDG-V2-12FR-BL
TRYBE Defense Magnite Go Fast Ultra Lightweight Handguard, Full Top Rail, M-LOK, Black, 12in, MGHDG-V2-12FR-BL
(5)
$219.99 $179.99 Save Up to $40.00
Free 2 Day Shipping TRYBE Defense Magnite Ultra Function Lightweight Handguard, Cut Top Rail, M-LOK, Black, 12in, MGHDG-V1-12CR-BL
TRYBE Defense Magnite Ultra Function Lightweight Handguard, Cut Top Rail, M-LOK, Black, 12in, MGHDG-V1-12CR-BL
(4)
$199.99 $159.99 Save Up to $40.00
Free 2 Day Shipping TRYBE Defense Magnite Ultra Function Lightweight Handguard, Cut Top Rail, M-LOK, FDE, 12in, MGHDG-V1-12CR-FDE
TRYBE Defense Magnite Ultra Function Lightweight Handguard, Cut Top Rail, M-LOK, FDE, 12in, MGHDG-V1-12CR-FDE
(4)
$199.99 $159.99 Save Up to $40.00
Free 2 Day Shipping TRYBE Defense Magnite Go Fast Ultra Lightweight Handguard, Cut Top Rail, M-LOK, Black, 12in, MGHDG-V2-12CR-BL
TRYBE Defense Magnite Go Fast Ultra Lightweight Handguard, Cut Top Rail, M-LOK, Black, 12in, MGHDG-V2-12CR-BL
(8)
$219.99 $179.99 Save Up to $40.00
Free 2 Day Shipping TRYBE Defense Magnite Ultra Function Lightweight Handguard, Full Top Rail, M-LOK, Black, 12in, MGHDG-V1-12FR-BL
TRYBE Defense Magnite Ultra Function Lightweight Handguard, Full Top Rail, M-LOK, Black, 12in, MGHDG-V1-12FR-BL
(9)
$199.99 $159.99 Save Up to $40.00
SightMark LoPro Laser/Light/IR Combo Green Laser Picatinny/Weaver Flat Dark Ea SM25013DE
SightMark LoPro Laser/Light/IR Combo Green Laser Picatinny/Weaver Flat Dark Ea SM25013DE
(10)
$239.99 $199.97 Save $40.02
Questions & Answers
Will this fit on a diamond back DB-10?

No. The DB-10 is an AR10, not a AR15 or M4 variant. This is not compatible.

by Eric, Verified Owner, November 4, 2019
See 1 More Answer
Will this fit on a Aero Precision M5 .308 upper receiver? Expert Answer

The Daniel Defense M4A1 Rail Interface System RIS II is not compatible with an Aero Precision M5 upper. This rail is designed for AR15 pattern receivers, not DPMS pattern.

by Ethan, Gear Expert, October 7, 2022
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review Solid Rail by C.S., Verified Owner, February 28, 2021
The Daniel Defense RIS II is an absolutely solid rail for your AR. Once it’s on, it’s on and not moving around. Yes it’s heavier than your current m-lok rail but still nothing beats a solid quad rail in terms of rigidity.
1/1 found this helpful
Helpful Positive Review Daniel Defense M4A1 Rail Interface System by Legacy Reviewer, September 22, 2013
the very BEST rail system on the market! you can never go wrong with Daniel Defense. you may pay a bit more, but you will be very satisfied with it. best of all, I got it installed under 30 minutes. installation was very easy. Pros: Very Easy to in...
Read More...
1/1 found this helpful
Most Recent Reviews Bomb Proof by C88, Verified Owner, March 13, 2024
If you are looking at this rail, chances are you already know of its reputation. It's a rock solid rail that lives up to the hype. It's an older design obviously and it's larger and heavier than mlok rails, but it has ZERO flex and is built like a ta...
Read More...
Most Recent Reviews ris 2 rail by Matt Mcquate, March 9, 2024
I love my ris 2 rail. It looks great has great lock up and was lighter than I expected. My only problems were that the barrel nut wrench barely fit onto the barrel nut so when installing that I was stripping out the barrel nut lugs a little and the s...
Read More...
Most Recent Reviews DDM4A1 rail by INDY K, December 23, 2023
Great product pretty easy to install. Be careful nubs if your still wearing the M4 front sight block this has to be removed. Plan ahead for removing your front sight block and og barrel nut. The rail is solid, I mean it’s a Daniel Defense.. But I cer...
Read More...
Most Recent Reviews DD M4A1 ris ii handguard by Whitefeather, Verified Owner, December 5, 2023
I bought the hangard to build my M4A1 clone. Top-notch by Daniel defense. Overall price is crazy but you get what you pay for.
Read All 6 Reviews
Free Two Day Shipping
Best Rated

Free Express Shipping!

Select Two-Day Shipping and use coupon code 2DAYAIRClick to Copy Coupon Code during checkout to get a free shipping upgrade if eligible! See promotion details.
In Stock
2 Models Available

Show with deals only:

Free 2 Day Shipping
Color
All
Search
Free shipping* & free returns*
Expert AdviceRFQPrice Match
Add to Wishlist

Product Info for Daniel Defense M4A1 Rail Interface System RIS II

The Daniel Defense Rail Interface System (RIS II) was designed at the request of the United States Special Operations Command (SOCOM) for the SOPMOD II program. SOCOM had a specific requirement for a free float M203 solution and Daniel Defense responded, designing a revolutionary product to meet the government's need. The Daniel Defense RIS II allows the individual operator to free float the M203 grenade launcher without additional parts. As important, special tools are not required to mount the M203 grenade launcher. This was accomplished by integrating all of the needed parts to free float the M203 into the rail itself. The Daniel Defense RIS II is to be used in conjunction with the MK12 Low Profile Gas Block.image

Specifications for Daniel Defense M4A1 Rail Interface System RIS II:

Manufacturer: Daniel Defense
Gun Make: AR Platform
Gun Model: M4A1
Gun Type: Rifle
Handguard Length: 12.25 in
Gun Rail: Picatinny
Weight: 17.7 oz
Condition: New
Included Accessories: Standard
Height: 2.25 in
Quantity: 1
Width: 2.23 in
Length: 12.25 in

Features of:

  • Aircraft Grade 6061-T6 Aluminum
  • Free-Floating Barrel Design For Increased Accuracy
  • Two-Piece Design for USSOCOM Allows For the Attachment of an M203 Grenade Launcher When Lower Rail Section is Removed.
  • Battle-Tested, 6-Bolt Bolt-Up System Securely Attaches Handguard to the Upper Receiver
  • Grade 8 Military Specification Fasteners
  • Uninterrupted Upper Rail Platform & Mil-Spec 1913 Picatinny Rails
  • Mil-Spec Type III Hard Coat Anodized Finish (FDE or Black)
  • Inside Diameter 1.15"
  • Barrel Nut - Steel (For Patented Bolt-Up System)

Package Contents:

  • Daniel Defense M4A1 Rail Interface System RIS II

Related Products to Daniel Defense M4A1 Rail Interface System RIS II

Image of Daniel Defense DD5 V5 URG 20 inch 6.5mm Creedmoor Upper Receiver with Flash Hider Assembly Daniel Defense DD5 V5 URG 20 inch 6.5mm Creedmoor Upper Receiver with Flash Hider Assembly $1,931.00
Image of Daniel Defense DELTA 5 24" 6.5 Creedmoor Barrel, 1:8", HPALMA Daniel Defense DELTA 5 24" 6.5 Creedmoor Barrel, 1:8", HPALMA $636.00
Image of Daniel Defense M4A1 14.5 in Barrel 5.56mm NATO Upper Receiver Group Daniel Defense M4A1 14.5 in Barrel 5.56mm NATO Upper Receiver Group (4) $1,499.00
Image of Daniel Defense AR-15 Lower Receiver Parts Kit, Semi-Auto Daniel Defense AR-15 Lower Receiver Parts Kit, Semi-Auto (23) $136.50 (Save 14%) $118.00 Best Rated
Image of Daniel Defense M4A1 RIII URG 14.5 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly 2 models Daniel Defense M4A1 RIII URG 14.5 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly $1,499.00
Image of Daniel Defense DDM4 V7 Pro 18in 5.56 Upper Receiver Daniel Defense DDM4 V7 Pro 18in 5.56 Upper Receiver (2) $1,572.00
Image of Daniel Defense DD4 RIII URG 16 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly 2 models Daniel Defense DD4 RIII URG 16 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly (3) $1,499.00
Image of Daniel Defense Rail Interface System Ris III 6 models Daniel Defense Rail Interface System Ris III (2) $505.33 (Save Up to $4.33) $501.00 Free 2 Day Shipping
Image of Daniel Defense DD M4 Rail 4 models Daniel Defense DD M4 Rail (5) As Low As $427.00 Free 2 Day Shipping
Image of Daniel Defense M4A1 FSP 14.5in 5.56 Nato Upper Receiver Group Daniel Defense M4A1 FSP 14.5in 5.56 Nato Upper Receiver Group (3) $1,506.00
Image of Daniel Defense Remington 700 Pro Chassis System 3 models Daniel Defense Remington 700 Pro Chassis System As Low As $1,050.00
Image of Daniel Defense Rifle Barrel Assembly, 5.56mm NATO, 1:7 Twist, GOV/MID 5 models Daniel Defense Rifle Barrel Assembly, 5.56mm NATO, 1:7 Twist, GOV/MID (5) As Low As (Save Up to $5.99) $338.00 Free 2 Day Shipping
Image of Daniel Defense MK18 RIII URG 10.3 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly 2 models Daniel Defense MK18 RIII URG 10.3 inch 5.56x45mm NATO Upper Receiver with Flash Hider Assembly $1,412.00
Image of Daniel Defense Buttstock/Pistol Grip/Vertical Foregrip Combo Picatinny 3 models Daniel Defense Buttstock/Pistol Grip/Vertical Foregrip Combo Picatinny (35) $156.00 (Save Up to 16%) $135.00 Best Rated
Image of Daniel Defense MFR XS Rail Systems 4 models Daniel Defense MFR XS Rail Systems (11) As Low As (Save Up to $26.43) $315.00 Free 2 Day Shipping
Image of Daniel Defense Grip-N-Rip AR-15 Ambidextrous Charging Handle Daniel Defense Grip-N-Rip AR-15 Ambidextrous Charging Handle (6) $130.20 (Save 17%) $108.00 Best Rated
Image of Daniel Defense Rifle Barrel Assembly, 5.56mm NATO, 1:7 Twist, LightWeight/MID 3 models Daniel Defense Rifle Barrel Assembly, 5.56mm NATO, 1:7 Twist, LightWeight/MID (6) As Low As (Save Up to $20.40) $338.00 Free 2 Day Shipping
Image of Daniel Defense MK18 Rail Interface System II, RIS II 2 models Daniel Defense MK18 Rail Interface System II, RIS II (3) $508.99 (Save $7.99) $501.00
Image of Daniel Defense MFR XL Rail Systems 4 models Daniel Defense MFR XL Rail Systems (4) As Low As $315.00 Free 2 Day Shipping
Image of Daniel Defense Big Hole Upper Reciever w Feed Ramps Daniel Defense Big Hole Upper Reciever w Feed Ramps $233.00 Free 2 Day Shipping
Image of Daniel Defense Delta 5 Pro Chassis System 3 models Daniel Defense Delta 5 Pro Chassis System As Low As $1,050.00
Image of Daniel Defense Rifle Barrel Assembly, 5.56mm NATO, 1:7 Twist, M4/CAR 6 models Daniel Defense Rifle Barrel Assembly, 5.56mm NATO, 1:7 Twist, M4/CAR As Low As (Save Up to $14.99) $338.00 Free 2 Day Shipping
Image of Daniel Defense DD5 V3 URG 16 inch .308 Winchester Upper Receiver with Flash Hider Assembly Daniel Defense DD5 V3 URG 16 inch .308 Winchester Upper Receiver with Flash Hider Assembly $2,033.10 (Save $102.10) $1,931.00
Image of Daniel Defense Vertical Foregrip With Soft Touch Rubber Overmolding 3 models Daniel Defense Vertical Foregrip With Soft Touch Rubber Overmolding (21) $54.60 (Save 30%) $37.99 Best Rated

Daniel Defense M4A1 Rail Interface System RIS II Orderable Models

List of Orderable Models

Daniel Defense M4A1 Rail Interface System II, Black, DD-8001-BLK , MPN: 01-004-08001-006 , UPC: 852548002561 , Code: DDD-HZ-DDM4A1RI-DD-8001-BLK
Daniel Defense M4A1 Rail Interface System II, Flat Dark Earth, DD-8001 , MPN: 01-004-08001 , UPC: 852548002820 , Code: DDD-HZ-DDM4A1RI-DD-8001
Compare (0)
1 item has been added
Add at least two items to compare