Obc for sbr type rifles - SureFire Optimized Bolt Carrier System

Do your home work on what this is and why it exists before you buy! If you’re running this in a mk18 style build and want to run a suppressor in the future do yourself a favor and pick one of these up! Helps do away with bolt jump from over based short barrels and helps sort out dwell time issues. Quality is what you’d expect from surefire all and all this bolt is like 2jz swapping a Honda only your probably stuffing it into a psa rifle! Serious note rate of fire will take a small hit if you run full auto.