Spinta Precision AR-15 9mm Thermal Barrel - 8" Nitride (Rainier Arms Exclusive)

Spinta Precision created fins so the barrel can have a larger surface area to cool down. They manufacture their thermal barrels with strict tolerances. Their feed cone is one of the best in the industry and made to be reliable. Features & Specifications: Thermal Fins offer more surface area to cool down 1-10 twist 9.6oz Melonite/Nitride 4150 Chrome Moly 1/2x28 threaded Works with Colt or Glock Made in the USA