Daniel Defense RIS III 12.5"
12.55 in M-LOK RIS III, the rail Daniel Defense ships on the DD4 RIII rifle and upper
- Price
- $582
- Weight
- 1 lb 0.6 oz
- Brand
- Daniel Defense
- Category
- Handguards
Featured in
Features
- •M-LOK, 7 positions
- •12.55" length
- •6-bolt bolt-up system
- •16.61 oz
- •Continuous 1913 top rail
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Overview
The 12.55" RIS III is the mid-length of Daniel Defense's M-LOK rail family and the one the company builds its own DD4 RIII rifle and upper receiver group around. It carries the RIS II lineage forward: free-float design, 6061-T6 aluminum, the patented six-bolt bolt-up system with a steel barrel nut, Grade 8 fasteners, and an uninterrupted mil-spec 1913 top rail from receiver to muzzle end.
Accessory mounting moves to seven M-LOK positions along the handguard with integral QD swivel attachment points on both sides. At 16.61 oz it is heavier than the 10.5" version, which is what the extra two inches of aluminum and rail cost, but it covers a 16" mid-length barrel nearly to the gas block and gives a light, laser, and hand stop room to spread out.
Installation is a bolt-up job, not a drop-in. The upside of that is compatibility: the RIS III uses the same barrel nut and bolt-up plate as the RIS II, and the RIS III upper rail works with the RIS II lower rail. Daniel Defense also notes that M203 hangers interfere with pinned and welded muzzle devices, and recommends a gunsmith for RIS III installation on any firearm or upper with a pinned and welded device.
Key Features
- Seven M-LOK attachment positions along the handguard
- Uninterrupted mil-spec 1913 Picatinny top rail
- Aircraft-grade 6061-T6 aluminum construction
- Patented 6-bolt bolt-up system with steel barrel nut
- Grade 8 military specification fasteners
- Integral QD swivel attachment points on both sides
- Free-floating barrel design
- Backward compatible with the RIS II bolt-up system
Pros
- +The factory rail on Daniel Defense's own DD4 RIII rifle and upper
- +M-LOK sheds the bulk of the RIS II quad rail while keeping the bolt-up interface
- +Continuous top rail for night vision and clip-on optics
- +12.55 in covers a 16 in mid-length barrel out to the gas block
- +Integral QD sling points on both sides
Cons
- −16.61 oz is heavy against skeletonized M-LOK rails of the same length
- −Priced well above most M-LOK rails of this length
- −Bolt-up installation needs the barrel nut wrench, not a drop-in job
- −Daniel Defense recommends a gunsmith for installation over a pinned and welded muzzle device
Detailed Specifications
- Material
- Aircraft-grade 6061-T6 aluminum
- Finish
- Black
- Length
- 12.55 inches
- weight
- 16.61 oz
- width
- 1.95 inches
- height
- 2.16 inches
- Inner Diameter
- 1.34 inches
- mountingSystem
- Patented 6-bolt bolt-up system with steel barrel nut
- Rail Type
- M-LOK sides and bottom, continuous 1913 Picatinny top rail
- gasSystemCompatibility
- Rifle (Daniel Defense listed)
- slingMounts
- Integral QD swivel attachment points, both sides
- sku
- 01-004-03086-006
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Build Your Custom Configuration
Add the Daniel Defense RIS III 12.5" to your build and see how it enhances your platform.