DPMS DR-15 M4 DP51655120178 | 5.56 NATO | 16″ Barrel

The DPMS DR-15 M4 is a semi-automatic AR-pattern rifle chambered for 5.56 NATO with a 16″ M4-profile barrel and a 13.5″ lightweight M-LOK free-float handguard. It is built on forged 7075-T6 upper and lower receivers with standard M4 flat-top geometry and includes a six-position collapsible buffer tube and PSA Classic Carbine stock. A practical optic choice under $1,000 for this platform is the Vortex Strike Eagle 1-6×24, which pairs well for close-to-mid-range work.

Typical applications for this rifle include range training and competition shooting where a robust, mil-spec‑style AR platform is desired.

Product Specifications

• The manufacturer is DPMS.
• The manufacturer part number is DP51655120178.
• The action type is Semi-Auto.
• The chamber/caliber is listed as .223 REM/5.56 NATO.
• The barrel measures 16″ and uses an M4 profile.
• The barrel material is 4150V Chrome Moly Vanadium steel.
• The barrel finish is Phosphate.
• The twist rate is 1 in 7″.
• The gas system is Carbine-Length with a low-profile .750″ gas block.
• The handguard is a 13.5″ PSA lightweight M-LOK free-float rail.
• The upper and lower receivers are forged 7075-T6 aluminum with a hardcoat anodized finish.
• The bolt is made from Carpenter 158 steel and the bolt carrier is 8620 chrome-lined.
• The rifle ships with one 30-round magazine where available by law.
• The listed weight is approximately 7 lbs and the overall length is 32″.
• The UPC is 850032424325.

This DPMS DR-15 M4 presents a traditional, service-style AR platform with forged 7075 receivers, a full-spec bolt carrier group, and a free-float M-LOK handguard. It suits shooters who want a straightforward, mil-spec-based rifle for range work and competitive use, providing a durable foundation for optics, sights, and accessory setups. The gun’s construction and component selection prioritize long-term serviceability and parts commonality.