Daniel Defense DD5 V4 7.62×51 18″ 20rd M-LOK

Description

The Daniel Defense DD5 V4 in 7.62×51 NATO with an 18″ barrel and 20-round M-LOK configuration is a semi-automatic rifle built for the shooter who demands reliability and precision from a .308 platform. This is a serious tool for suppressed and unsuppressed use, featuring a cold hammer-forged barrel and an adjustable gas block that lets you tune the action to your ammunition and suppressor. It’s a rifle that rewards patience and attention to detail.

Key Features

• Cold Hammer-Forged, Chrome-Lined Barrel (18″ S2W Profile) — This barrel is hammer-forged from mil-spec steel, then chrome-lined for bore longevity and corrosion resistance. The S2W profile adds stiffness at the chamber and muzzle, reducing harmonics and improving accuracy over sustained strings of fire.
• Adjustable Gas Block (Low-Profile) — Allows you to dial back gas flow when running a suppressor, reducing carrier velocity and felt recoil. Run it wide open for unsuppressed use without over-gassing. This is a must for shooters who switch between suppressed and unsuppressed setups.
• Free-Floating DD5 M-LOK Rail — The rail attaches directly to the upper receiver, not the barrel, so nothing touches the barrel except the chamber and gas block. This keeps barrel harmonics consistent, which translates to tighter groups. The M-LOK slots let you mount lights, grips, or bipods without adding bulk.
• Reinforced 7075-T6 Machined Receiver Set — The upper and lower receivers are machined from 7075-T6 aluminum, a step above the 6061 used in many AR-10s. Additional material in high-stress areas around the barrel extension and buffer tower helps the rifle handle the heavier recoil impulse of the .308 round over thousands of rounds.
• 6-Position SoftTouch Overmolded Stock & Glass-Filled Polymer Grip — The stock is overmolded with a soft rubber texture that reduces slip and adds comfort against the shoulder. The grip uses glass-filled polymer for strength without the weight of aluminum. Both are ergonomically shaped for a natural point of aim.

Who It’s For

This rifle is built for the shooter who appreciates a traditional .308 battle rifle but wants modern ergonomics and suppressor compatibility. It’s for the handloader who tunes ammunition to match a specific barrel twist. It’s for the hunter who needs a reliable semi-auto for medium to large game at moderate ranges. It’s for the collector who recognizes that Daniel Defense puts the same care into the DD5 V4 as they do into their M4A1 military contracts.

Pros & Cons

• Pro: Adjustable gas block gives you the ability to run suppressed or unsuppressed with minimal tuning. Most .308 ARs require a separate gas block swap for suppressor use.
• Pro: Cold hammer-forged barrel is inherently stronger and longer-lasting than button-rifled barrels. Expect 10,000+ rounds of accurate life with proper maintenance.
• Con: The DD5 V4 is heavier than some purpose-built hunting rifles in .308. At 9.3 lbs unloaded, it’s not a lightweight mountain rifle. It’s a precision tool, not a pack gun.
• Con: The price point is high compared to entry-level .308 ARs. You’re paying for mil-spec materials, U.S. labor, and a company that stands behind its products.

Comparison

The Geissele URGI is a solid choice for a lighter setup but lacks the adjustable gas block, which limits suppressor use. The Lone Wolf is budget-friendly but uses 6061 aluminum and a non-adjustable gas block, making it less durable and less versatile for suppressed shooting.

FAQ

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Explore more in our AR Rifles and Daniel Defense categories. Last updated: April 2026.