These Amazing CHF barrels are extremely durable with a 20,000+ round service life. These CHF barrels are turned to ST's New Optimum barrel Profile. This New profile is lighter than government profile but beefier than a lightweight profile, it's an "Optimum" profile. It weighs 26.4oz with M4 Barrel extension and no FSB on the 16" Barrel. The barrels have a .750" gas block seat with a properly sized gas port and the muzzle is threaded perfectly concentric to the Bore with 1/2x28 threads. 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).
- Weight: 26.4 oz.
- Twist: 1:7
- Gas System: Mid-Length
- Barrel: CMV Cold Hammer Forged 16"
- Barrel Profile: Spike's Optimum profile
- Finish: Mil-Spec Phosphate
- Thread: 1/2x28 TPI Thread
- Model: SB51606-ML