18" SPR 5.56mm Stainless Steel

• 1 in 7" twist improved polygonal rifling with 556 Noveske Match Chamber
• Extended feed ramps 
• Bead blasted finish 
• Intermediate Length Gas Tube 
• Pinned Low Profile Gas Block, .750 
• 1/2x28 threads 
• Medium Contour 

Weight: 38 oz

The barrel ships with gas block. This barrel is designed for Noveske's gas block that is 1" long (INCLUDED). A standard front sight base is 1.9" long and WILL NOT FIT. Barrel installation should be performed by a qualified gunsmith. Installation of the gas block dowel pin and gas block is required to complete the assembly process.