The DPMS Panther Arms Quad-Rail Carbine (brand part no. DP51655156581) is a semi-automatic AR-15-platform rifle chambered in 5.56 NATO/.223 Remington, built around a forged 7075-T6 aluminum receiver set and a chrome-moly vanadium steel barrel. DPMS backs this carbine-length build with a fast-cycling gas system and a free-float M-Lok handguard, making it a versatile choice for home defense, range use, or general-purpose shooting. The 6-position adjustable stock lets shooters of any size or body armor setup dial in a comfortable length of pull. It is a straightforward, dependable AR carbine from one of the most established names in the platform.

Key Specifications

• Chambered in 5.56 NATO/.223 Remington for widely available, affordable ammunition.
• Features a 16-inch barrel for a legal, maneuverable carbine length.
• Built with chrome-moly vanadium steel barrel construction for durability under sustained use.
• Rifled with a 1:7 twist rate to stabilize a wide range of 5.56/.223 bullet weights.
• Wrapped in a 13.5-inch M-Lok free-float handguard for unobstructed accuracy and accessory mounting.
• Runs on a carbine-length gas system for reliable cycling in a compact package.
• Built on a forged 7075-T6 aluminum lower receiver for strength and long-term durability.
• Finished in a hard-coat anodized coating for corrosion and wear resistance.
• Equipped with a 6-position adjustable M4-style stock for a customizable length of pull.
• Holds a 30-round magazine capacity for extended range sessions.

Frequently Asked Questions

What caliber is the DPMS Quad-Rail carbine chambered in? It is chambered in 5.56 NATO, which also safely fires .223 Remington ammunition.

Is the stock adjustable? Yes, it uses a 6-position adjustable M4-style stock.

What handguard does it use? A 13.5-inch free-float M-Lok handguard that keeps the barrel unobstructed and gives room for accessories.

Buy the DPMS Panther Arms Quad-Rail Carbine

Add a proven DPMS/Panther Arms carbine to your collection with the Quad-Rail, part of our semi-auto rifle lineup. Order through our Lubbock, Texas gun shop for fast, insured shipping straight to your local FFL.