• 16″ barrel, chambered in 5.56NATO. Carbine gas length. M4 profile. 1:8 twist
  • A2 birdcage flash hider with top vents. Prevents kicking up dust when firing prone.
  • 15″ M-lok handguard with full-length picatinny top rail. Oblong relief cuts, built-in QD mounts and anti-rotation tabs make this rail versatile and easy to grip.
  • US made upper receiver with forward assist and dust cover installed.
Direct Link: https://3crtactical.com/product/ar-15-16-5-56-nato-upper-receiver-free-float-m-lok-rail/