The Daniel Defense DD5 V4 18″ M-LOK Rifle – 20rd is a precision AR-style rifle built for the long haul. An 18-inch S2W cold hammer-forged barrel and adjustable gas block deliver repeatable accuracy and reliable function, even in adverse conditions. This rifle feeds from SR-25 magazines and carries a full-length DD5 M-LOK rail for mounting gear where you need it.
| Manufacturer | Daniel Defense |
|---|---|
| Model | DD5 V4 |
| Material | 7075-T6 aluminum receiver, S2W cold hammer-forged steel barrel (per manufacturer specs) |
| Compatibility | SR-25 style magazines |
| Finish | Mil-spec hardcoat anodized black |
| Weight | Approximately 9.8 lbs (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- S2W Cold Hammer-Forged Barrel – The 18-inch barrel is hammer-forged for extended life, then stress-relieved and lapped for consistent accuracy shot after shot. Why it matters: You get a barrel that holds zero under heavy strings and resists throat erosion better than button-rifled barrels.
- Adjustable Gas Block – Tuned for suppressed and unsuppressed fire without swapping parts. Why it matters: You can dial back gas for softer recoil or open it up with a suppressor, keeping the action reliable in both setups.
- Full-Length DD5 M-LOK Rail – Free-floated, 15-inch handguard with M-LOK slots at 3, 6, and 9 o’clock. Why it matters: You mount bipods, lights, and grips directly without adding weight or bulk, and the free-floating design preserves barrel accuracy.
- Hardened Bolt Carrier Group – MP-tested, shot-peened carrier with a chrome-lined bolt and gas key staked per mil-spec. Why it matters: The BCG takes the abuse of high-pressure rounds and keeps running when lesser carriers start dragging.
- Superior Suppression Device Muzzle – Daniel Defense’s proprietary muzzle brake and suppressor mount interface built into the barrel. Why it matters: You get a flat-shooting brake out of the box and a direct mount for DD suppressors without threading adapters.
Who It’s For
This rifle is for the guy who needs to reach out and touch a coyote at 400 yards, then walk the fence line and trust his rifle to cycle dirty. It’s for the rancher who wants one platform that covers predator control, varmint elimination, and range practice without a second gun. If you’re the type who checks zero before sunrise and doesn’t want to fiddle with gas settings in the field, the DD5 V4 fits your kit.
Pros and Cons
- Pro: 18-inch S2W barrel offers a good balance of velocity and maneuverability for a .308 platform. You get 2,700+ fps with 168-grain match loads out of an 18-inch tube.
- Pro: Adjustable gas block means you can tune for your specific load or suppressor without sending the rifle back.
- Cons: The rifle is heavier than some hunting rifles—around 9.8 pounds unloaded. If you’re packing it up a mountain all day, you’ll feel it. That’s the trade-off for a free-float rail and heavy barrel profile.
Comparison
| Feature | Daniel Defense DD5 V4 | Geissele Automatics Super Duty | Zev Technologies OZ-9C |
|---|---|---|---|
| Caliber | .308 Win / 7.62 NATO | 5.56 NATO | 9mm |
| Barrel Length | 18 inches | 16 inches | 4.5 inches |
| Gas System | Adjustable, mid-length | Fixed, mid-length | N/A (pistol) |
| Weight (unloaded) | ~9.8 lbs | ~7.5 lbs | ~1.8 lbs |
| Magazine Compatibility | SR-25 pattern | AR-15 standard | Glock 19 |
| Price | $2,812 | $1,800 | $1,200 |
FAQ
Does this rifle come with a magazine?
Yes, the DD5 V4 18″ M-LOK Rifle ships with one 20-round SR-25 pattern magazine. Additional SR-25 magazines are widely available from Magpul, Lancer, and Daniel Defense.
What twist rate does the barrel have?
Per Daniel Defense specs, the 18-inch S2W barrel uses a 1:10 twist rate, optimized for 150–175 grain .308 loads. This handles everything from M80 ball to 168-grain match ammo with good accuracy.
Can I use this rifle with a suppressor?
Yes. The adjustable gas block allows you to tune for suppressed fire, and the Superior Suppression Device muzzle works with Daniel Defense suppressors. For other suppressors, you’ll need a compatible muzzle device with the same thread pitch (5/8×24).
What is the weight of the DD5 V4?
The rifle weighs approximately 9.8 pounds unloaded, per manufacturer specs. With a loaded 20-round magazine, expect it to run around 10.5 pounds.
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AR Rifles | .308 Rifles | Daniel Defense
Last updated: April 2026
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This Daniel Defense DD5 V4 18″ M-LOK Rifle – 20rd is ideal for shooters looking to buy guns online with confidence. Built with precision engineering and tested performance, it’s a top-tier choice whether you're looking for home defense, sport shooting, or a trusted everyday carry.
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