Brownells AR-15 Bolt Carrier Group Nitride MP

Description

Product Overview

Brownells AR-15 Bolt Carrier Group Nitride MP is a ready-to-install replacement built for reliable cycling in AR-15 rifles chambered for 5.56 NATO, .223 Remington, or .300 Blackout. It uses a nitride-finished bolt machined from 9310 tool steel and a nitride-finished 8620 hardened-steel carrier, with a torqued-and-staked gas key for consistent operation. The bolt is magnetic-particle inspected and the group is supplied with the key firing and extraction components for a complete swap.

Key Features

• Nitride coating on the bolt, carrier, and key BCG components for enhanced corrosion resistance
• 9310 tool-steel bolt heat-treated and shot-peened for durable operation
• 8620 hardened-steel bolt carrier for strength and consistent cycling
• Torqued-and-staked gas key to help maintain gas-key retention
• Magnetic-particle inspected bolt for quality control
• Includes the standard BCG internal components for a straightforward installation

Keep a dependable spare on hand or finish a build with a Brownells AR-15 BCG engineered for 5.56-pattern performance.