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Daniel Defense M4A1 SOCOM Upper Receiver Group, 14.5″ 5.56 NATO, RIS II
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Daniel Defense M4A1 SOCOM URG: a complete 14.5 in. 5.56 NATO upper with a cold hammer forged M4-profile barrel, 1:7 twist, carbine gas system, the black M4A1 RIS II quad rail and an extended Daniel Defense flash suppressor pinned and welded in place.
The Daniel Defense M4A1 SOCOM Upper Receiver Group, 14.5″ 5.56 NATO, RIS II (part 23-004-12100) is a complete upper built around a 14.5 in. cold hammer forged M4-profile barrel in 5.56mm NATO with a 1:7 twist and a carbine-length gas system, fitted with the black Daniel Defense M4A1 Rail Interface System (RIS) II Picatinny quad rail and an extended Daniel Defense Flash Suppressor pinned and welded to the barrel.
The permanently attached muzzle device is the other defining feature. The extended Flash Suppressor is pinned and welded – it is not coming off. That is the method Daniel Defense uses to bring a 14.5 in. barrel to the 16 in. rifle minimum, so this upper avoids the short-barrel complication a bare 14.5 in. or 12.5 in. URG carries. It also means the muzzle device is not a choice: no brake, no direct-thread suppressor adapter on those threads.
An upper receiver group contains no serialized part. The regulated component of an AR-pattern rifle is the lower receiver, so a URG is not a firearm in its own right and needs no FFL transfer and no background check – it ships like any other component. You still need a complete lower, and that is the part that transfers: see our complete lowers and lower receivers.
Barrel length, the muzzle device and the law
This is where the pinned-and-welded device matters. A sub-16 in. barrel fitted to a rifle-configured lower creates an NFA short-barrelled rifle unless the firearm is registered as one or was built as a pistol. Here the extended Flash Suppressor is permanently attached, and a permanent device is measured as part of the barrel – exactly how Daniel Defense brings its 14.5 in. barrels to the 16 in. minimum. It remains your responsibility to know how your finished rifle measures, so call 817-393-4000 before assembling if in any doubt. Compare the rest of our Daniel Defense uppers.
Ordering from Western Sport in Roanoke, TX
Western Sport is a Daniel Defense master dealer and has been a licensed FFL/SOT dealer in Roanoke, Texas since 2007, with a gunsmith on site. Ordering a URG is simple because it needs no transfer, but assembling it onto the right lower is worth a conversation. Call 817-393-4000 and tell us what the lower is.
Frequently Asked Questions
Q: Do I need an FFL to buy the M4A1 SOCOM upper receiver group?
A: No. An upper receiver group has no serialized part, so it is not a firearm and needs no FFL transfer or background check. Only the lower receiver is the regulated component, which is why complete uppers can be ordered and shipped directly to you.
Q: Is a 14.5 in. upper legal on my rifle lower?
A: A sub-16 in. barrel on a rifle-configured lower makes an NFA short-barrelled rifle unless the firearm is registered as one or was built as a pistol. On this URG the extended Flash Suppressor is pinned and welded, and a permanent device is measured as part of the barrel – which is how Daniel Defense reaches the 16 in.
Q: Does this URG come with a bolt carrier group and charging handle?
A: Yes. Daniel Defense lists this upper receiver group as including an M16-profile bolt carrier group – Mil-Spec MP tested, chrome lined, with a properly staked gas key – and the independently ambidextrous GRIP-N-RIP charging handle. Call 817-393-4000 if you want that confirmed before it ships.
Q: What is the RIS II rail and why choose a quad rail?
A: The RIS II is the Daniel Defense Picatinny quad rail in use by US Special Operations Command for the SOPMOD Block II program. A quad rail gives continuous Picatinny on four sides, so any Picatinny accessory mounts without an adapter. It is heavier than M-LOK – that is the trade.
Q: Can I change the muzzle device on this upper?
A: No. The extended Daniel Defense Flash Suppressor is pinned and welded to the barrel, which makes it permanent. 5 in. barrel to the 16 in. rifle minimum, but it rules out a brake, a compensator or a direct-thread suppressor adapter on that muzzle.
Q: How much does the M4A1 SOCOM URG weigh?
A: 56 lbs. That figure is for the upper, not a complete rifle, so add your lower, stock and magazine. The weight reflects the RIS II quad rail and the M4-profile barrel; an M-LOK-railed upper of the same length is lighter.
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