Overview Reviews Product Description 16" 9mm Thermal Barrel for AR-15 Thermal Fins offer more surface area to cool down 1-10 twist 1lbs 3oz Melonite/Nitride 4150 Chrome Moly 1/2x28 threaded Works with Colt or Glock Made in the USA Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × 16" 9mm Thermal Barrel Nitride for AR-15 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments