Elevate your shooting experience with the Guntec USA GT-BCG-308-NB AR .308 Cal Nickel Boron Bolt Carrier Group. Crafted for durability and performance, this MIL-SPEC BCG ensures reliability in every shot. Designed for the discerning shooter, the Nickel Boron finish enhances lubricity while reducing wear, making it a top choice for high-volume shooting. Experience smoother cycling and easier cleaning, maximizing your range time. Nickel Boron coated for enhanced durability MIL-SPEC dimensions for a perfect fit Provides smoother operation and better reliability Compatible with .308 caliber rifles Upgrade your firearm with this premium bolt carrier group for unmatched performance.