Diamondback DB15 DB175AK221 | 5.56 NATO | 16″ Barrel | 30+1

The Diamondback DB15 (DB175AK221) is an AR-style semi-automatic rifle chambered for 5.56x45mm NATO, built around a carbine-length, medium 4150 chrome moly barrel and a mid-length gas system. It features Mil-Spec 8620 bolt carrier group construction, 7075-T6 aluminum receivers, a 15″ M-LOK handguard and Magpul FDE carbine stock and grip. The rifle ships with a 30-round Gen 3 PMAG MCT. A good optic pairing under $1,000 for this platform is the Vortex Strike Eagle 1-8×24, which provides flexible magnification for both close and intermediate ranges.

Typical applications for this configuration include range training/precision practice and practical/competitive shooting where a mid-length gas system and 16″ barrel balance controllability with effective velocity.

Product Specifications

• The rifle is chambered in 5.56x45mm NATO.
• The barrel measures 16 inches and is a medium 4150 chrome moly profile.
• The gas system is a mid-length configuration.
• The bolt carrier group is a shot-peened Mil-Spec 8620 unit.
• The receivers are made from 7075-T6 aluminum.
• The handguard length is 15 inches and uses M-LOK attachment points.
• The stock is a Magpul Carbine and the grip is a Magpul model in FDE finish.
• The muzzle device is an A2 flash hider.
• The trigger is a Mil-Spec style trigger.
• The rate of twist is 1:8.
• The listed overall length is 32.50 to 35.75 inches depending on stock position.
• The action is semi-auto.
• The barrel is described as threaded.
• The capacity is 30 + 1 rounds.
• The UPC for this item is 810035755475.

The DB15 platform here combines common AR ergonomics with a mid-length gas system and Magpul furniture to provide a dependable, configurable rifle suitable for accuracy work and competitive formats. The 16″ chrome moly barrel and 1:8 twist rate make it compatible with a wide range of bullet weights commonly used in training and practical shooting.

Related Videos: