Northstar Arms NS-15 5.56. 

• 16-inch Ballistic Advantage QPQ-coated HBAR balances durability with consistent performance.
• Chambered for both 5.56 NATO and .223 Remington ammunition.
• Mid-length gas system supports smooth, reliable cycling.
• 15-inch M-LOK rail provides flexible accessory and optic placement.
• ALG Defense Mil-Spec trigger offers a clean, consistent trigger system.
• Hogue adjustable stock
• One 30 rd magazine
• Magpul flip Sights
• Timber Creek safety selector