Brownells BRN AR-15/M16 5.56MM BOLT ASSEMBLY, MPI, NITRIDE AZT-M4-556-ST-001

The Brownells M16 5.56 Complete 9310 Bolt Assembly is built to withstand heavy-duty use in both semi-auto AR-15s and full-auto M16 rifles and features construction and testing that ensures high-quality performance.

The Brownells M16 5.56 Bolt Assembly is constructed entirely from 9310 steel, which is designed to provide the elements needed to perform during rugged duty use.

• Material quality checked with magnetic-particle inspection
• Extractor includes spring and rubber insert
• Optimized for use with all 5.56-NATO-based cases

The Brownells M16 5.56 Bolt Assembly includes bolt, gas rings, extractor and ejector installed.