SureFire SF-OBC-556 Optimized Bolt Carrier Group Serrated Blade Single-Use Design: Once fired

Single-Use Design: Once fired

model 5601

Finish: Plain matte black

It won't get lost

reliable deployment

SureFire SF-OBC-556 Optimized Bolt Carrier Group Serrated Blade Single-Use Design: Once firedSureFire SF OBC 556 Optimized Bolt Carrier Group Double Down on Reliability. Invented by Jim Sullivan, one of the original designers of the M16, the SureFire Optimized Bolt Carrier (OBC) doubles the reliability of any M4 M16 AR variant weapon system during suppressed and suppressed firing. Its patented design allows more time for reliable feeding of ammunition from the magazine and nearly eliminates bolt over base malfunctions. The OBC also delays