SUREFIRE OPTIMIZED BCG/BUFFER/SPRING BCG

SUREFIRE OPTIMIZED BCG/BUFFER/SPRING

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Surefire OBC (Optimized Bolt Carrier Group), Black finish, Includes Long-Stroke Buffer and Improved Buffer Spring SF-OBC-556

Surefire Optimized Bolt Carrier Group for Direct-Impingement M4/M16/AR-Variant Carbines - SF-OBC-556 

Invented by Jim Sullivan, one of the original designers of the M16, the SureFire Optimized Bolt Carrier (OBC) is designed to improve the functionality of an M4/M16/AR variant weapon system during both unsuppressed and suppressed firing. This patented design makes numerous improvements to the standard Mil-Spec full-auto bolt carrier group which allows more time for reliable feeding of ammunition from the magazine, nearly eliminating bolt-over-base malfunctions. The OBC also delays unlocking of the bolt during the firing sequence, which allows expanding gases more time to exit the bore, in turn reducing back-pressure gases exiting the upper receiver group. Additionally, the neutrally balanced counterweight improves carrier and barrel extension lock-up, nearly eliminating bolt bounce. The OBC also reduces felt recoil, allowing for better tracking of sights and more control of the weapon when firing. Coated with an advanced anti-friction coating, the OBC resists friction during use and makes cleaning easy. For the ultimate in reliability, choose the SureFire OBC.

Features:

Neutrally balanced counterweight automatically reduces cyclic rate, negating the need for switch or setting adjustments. Improved cam path delays unlocking, allowing the chamber pressure to drop another 15% which permits more gasses to exit the bore Nearly eliminates bolt bounce Long stroke design improves reliability, allowing ammunition more time to feed properly Utilizes Mil-Spec bolt and components Anti-friction coating resists corrosion and makes cleaning easy SF-OBC-556 comes standard with Optimized Bolt Carrier, Long-Stroke Buffer, and Improved Buffer Spring