DIAMONDBACK DB15 | 5.56 NATO | 16in Barrel | DB1758K001

The Diamondback DB15 is a 5.56 NATO semi-automatic AR-style rifle built for reliability and everyday versatility. It features a 16-inch mid-length 4150 Chrome-Moly barrel with a black nitride finish, a 15-inch M-LOK anti-rotation handguard, and forged 7075-T6 aluminum receivers. For an optic under $1000 that pairs well with this configuration, consider the Vortex Strike Eagle 1-6×24 for a versatile balance of close-quarters and medium-range capability.

This rifle is well suited to precision practice at the range and competition-style shooting where dependable ergonomics and a crisp trigger matter. The combination of a mid-length gas system, shot-peened Mil-Spec bolt carrier, and a CMC 3.5 lb single-stage drop-in trigger provides a stable, consistent shooting experience.

Product Specifications

• The rifle is chambered in 5.56 NATO.
• The barrel is a 16-inch mid-length 4150 Chrome-Moly (CrMoV) with a black nitride finish.
• The rifling twist rate is 1:8 RH.
• The gas system is a mid-length gas system with a pinned gas block.
• The bolt carrier group is a shot-peened, magnetic particle inspected Mil-Spec 8620 carrier.
• The upper receiver is a A3 flattop forged 7075 T-6 aluminum unit.
• The lower receiver is a forged 7075 T-6 aluminum Diamondback Diamond lower with an enhanced skeletonized trigger guard.
• The handguard is a 15-inch M-LOK anti-rotation (S-rail).
• The stock is a Magpul ACS-L adjustable stock and the grip is a Magpul MOE K2+.
• The trigger is a CMC 3.5 lb single-stage drop-in trigger.
• The included magazine is a Gen 2 PMAG 30-round magazine (one included).
• The muzzle device is a Diamondback CNC muzzle brake, 1/2×28 tpi.
• The overall weight is 6.95 lb.
• The overall length is 34 inches collapsed and 37-1/4 inches expanded.
• The UPC is 810035753136.

Thoughtfully configured out of the box, the DB15 offers a balanced platform for shooters who prioritize consistent function and modularity. The combination of a nitride-treated 4150 barrel, robust forged receivers, and a proven single-stage trigger makes this rifle a practical choice for precision range work and competition formats where reliability and control are important. The 15″ M-LOK handguard provides ample room for accessories without overly lengthening the profile, and the Magpul furniture supports a wide range of shooter preferences.

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