Surefire OBC Optimized Bolt Carrier Group, Black, Long-Stroke Buffer, Improved Buffer Spring

The SureFire OBC is designed to greatly increase the reliability of an M4/M16/AR variant during both unsuppressed and suppressed firing. The OBC comes as a package with the OBC bolt carrier group as well as buffer and buffer spring. Improved cam path delays unlocking, allowing the chamber pressure to drop another 15% which permits more gases to exit the bore. Coated with an advanced anti-friction coating, the OBC resists friction during use and makes cleaning easy.

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• Model : Optimized