Diamondback Firearms DB15D Copperhead 18″ .223 Wylde Semi-Auto AR Rifle

The Diamondback Firearms DB15D Copperhead is an 18-inch barreled, semi-automatic AR-platform rifle chambered in .223 Wylde — a chamber specification purpose-built to deliver match-grade accuracy with both .223 Remington and 5.56 NATO ammunition. Designed for the serious shooter who demands precision at distance, the Copperhead is a capable platform for target shooting, competition, and varmint hunting alike. It ships with a 30-round Magpul PMAG, ready to run from the first range session.

Key Specifications

• The rifle is chambered in .223 Wylde, optimized for accuracy with both .223 Rem and 5.56 NATO loads.
• The barrel measures 18 inches, striking a balance between velocity, precision, and maneuverability.
• A 1-in-8 inch rate of twist stabilizes a wide range of projectile weights for versatile ammunition selection.
• Operation is semi-automatic, delivering reliable, consistent cycling for follow-up shots.
• Capacity is 30+1 rounds, supported by the included 30-round Magpul PMAG magazine.
• The ATF classification is a Rifle, compliant with federal regulations.
• The platform ships with no sights installed, leaving the optics rail open for your preferred glass or red dot.
• Manufacturer part number is DB1780H631, backed by Diamondback Firearms quality standards.

The DB15D Copperhead is built for shooters who won’t compromise on accuracy or versatility. The .223 Wylde chamber paired with an 18-inch barrel and 1-in-8 twist unlocks the full ballistic potential of modern precision loads, while the optics-ready platform lets you configure it exactly how you want it. Whether you’re pushing steel at distance or chasing tight groups on paper, the Copperhead is a refined, no-nonsense AR ready to perform.