Daniel Defense
Daniel Defense M4A1 RIS II Upper Receiver Group 14.5"
Block 2 RIS II upper without the front sight post. Low-profile pinned gas block under the quad rail for a clean folding-sight build.
Quick Specs
- Price
- $1,544
- Weight
- N/A
- Brand
- Daniel Defense
- Category
- upper
Features
- •5.56 NATO
- •14.5" CHF M4 profile (16" P&W)
- •Carbine gas, pinned low-profile gas block
- •RIS II Picatinny quad rail
- •BCG & GRIP-N-RIP CH included
Capability Boosts
Recommended For
+13 more
Compatibility Tags
Overview
The Daniel Defense M4A1 RIS II Upper Receiver Group is the Block 2 host for builders who want the SOPMOD silhouette without the fixed front sight post. It runs the same RIS II Picatinny quad rail that SOCOM adopted in 2005, but instead of the triangular FSP it uses a pinned low-profile gas block under the rail, so you can run a folding front sight and keep a clean top-rail line for an EOTech or red dot at the height you choose.
The barrel is a 14.5-inch cold hammer forged chrome-lined Chrome Moly Vanadium M4 profile, carbine-length gas, pinned and welded with a Daniel Defense Extended Flash Suppressor to reach 16 inches for non-NFA compliance. Note that this is the DD flash hider, not the SureFire SF3P, so it is not a drop-in mount for the SureFire SOCOM suppressor family; the FSP variant ships the SF3P if a suppressor-correct front end matters to you.
The group ships complete with a Daniel Defense M16-profile bolt carrier group and the ambidextrous GRIP-N-RIP charging handle, so pairing it with any forged 7075 lower delivers a complete non-NFA M4A1 in the Block 2 RIS II configuration.
Key Features
- 14.5" cold hammer forged M4 profile barrel, chrome lined, HP/MPI tested
- RIS II Picatinny quad rail, the SOCOM SOPMOD Block II handguard since 2005
- Pinned low-profile gas block, no FSP, carbine-length direct impingement gas
- DD Extended Flash Suppressor pinned and welded to 16" overall
- Daniel Defense M16-profile BCG, MPI tested with staked gas key
- GRIP-N-RIP ambidextrous charging handle included
- 7075-T6 upper with Type III hard-coat anodizing
Pros
- +RIS II quad rail in the correct Block 2 configuration without the triangle FSP
- +Low-profile gas block lets you run a folding front sight and any optic height
- +Complete with M16 BCG and ambidextrous charging handle
- +NFA-exempt at 16" with the pinned and welded flash suppressor
- +Carbine-length gas matches the issued M4A1 cyclic spec
Cons
- −Ships the DD flash hider, not the SureFire SF3P, so it is not a drop-in SOCOM suppressor host
- −Pinned muzzle device and pinned gas block both require a gunsmith to change
- −Quad rail is heavier than the M-LOK RIS III and needs rail panels for a bare-hand grip
- −Requires a stripped lower, LPK, and stock to finish
Detailed Specifications
- caliber
- 5.56x45mm NATO
- barrelLength
- 14.5" (16" with P&W muzzle device)
- barrelProfile
- M4
- barrelMaterial
- Chrome Moly Vanadium, Cold Hammer Forged
- barrelFinish
- Chrome Lined, Mil-Spec Heavy Phosphate
- twist
- 1:7
- gasSystem
- Carbine Length, Direct Impingement
- gasBlock
- Pinned Low Profile, 4140 Steel, Phosphate
- handguard
- RIS II Picatinny Quad Rail
- upperReceiver
- 7075-T6 Aluminum, Type III Hard Coat Anodized
- bcg
- M16 Profile, MPI Tested
- chargingHandle
- GRIP-N-RIP, Ambidextrous
- muzzleDevice
- DD Extended Flash Suppressor, Pinned & Welded
- threadPitch
- 1/2x28
- madeIn
- USA
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Build Your Custom Configuration
Add the Daniel Defense M4A1 RIS II Upper Receiver Group 14.5" to your build and see how it enhances your platform.