• Chambered in 5.56 NATO
  • 16″ length
  • ATF compliant caliber marking on barrel
  • Carbine length gas system
  • 1:8 right-hand twist
  • 4140 chrome-moly lining
  • Hard black nitride coating
  • 0.063″ gas port
  • 29.1oz weight

Direct Link: https://3crtactical.com/product/ar-15-m16-m4-16-5-56nato-18-barrel/