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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.