These CHF barrels are made to the Mil-Spec for the M249 SAW. The Cold Hammer Forging process Work Hardens the steel around a rifled mandrel, which creates the lands and grooves. These barrels are chambered in 5.56 NATO, with a 1/7 Twist Rate. The barrel blanks are the correct Certified CMV material and they are also Hard Chrome lined to the M249 SAW Mil-Spec, which is almost twice as thick as the Hard Chrome on a Mil-Spec M4. The End Result is a Rifle that can be Run Hard Day after Day!
Each barrel is HPT and MPI. They have Mil-Spec M4 barrel extensions, Mil-Spec Phosphate finish on the outside (under the front sight base as well). They also include a set screwed and pinned Spike's Tacial Low Profile Gas Block (set screws and pin come loose for ease of installation).
Spike's Tactical Micro .750" Gas Block
The Spike’s Tactical Low-Profile Gas Block is CNC machined from solid billet steel and a Melonite coating inside and out. Due to its low profile design it will fit under most aftermarket rail systems so you can have a rail longer than your gas system allowing for a longer sight radius when using iron sights and also giving you more room out front to mount your forward grip and/or light for better handling and control.