The Optimized Carrier Key Screws (OCKS) are designed to provide significant advantages over the standard cap screw used in carrier keys. These were designed by Ned Christiansen and are quickly becoming the new standard in gas carrier screws.
Proper staking is crucial to reliable operation. An improperly staked carrier key can become loose under firing, and can cause a debilitating malfunction that can render a firearm inoperable in the field. The OKCS has sharp, deep, and effective knurling with 12 deeper splines. These OCKS allow for metal to flow into the space when staking, creating more metal on metal contact. These are the same screws used in our bolt carriers.
These screws are American made by a small American business and are sure to never let you down. Original post on m4carbine.net can be found here: https://www.m4carbine.net/showthread.php?195130-On-loose-carrier-key-screws
It makes sense then for us to offer Ned’s OCKS separately, outside of our BCG. OCKS are sold as a pair (2 screws). The torque value for OCKS is 50-58 in/lbs.
If you’re looking for a tool to properly stake OCKS, please visit Ned’s site http://www.m-guns.com/tools.php
Each Optimized Carrier key screw kit comes with 2 screws and an Allen wrench.