This is the newer updated V2 2.0 spring that goes inside the factory 2.0 bolt.

This has the longer V2 spring screw. This updated V2 screw will hold the spring in place better then the V1 screw when the spring is compressed. Less chance of spring bending. 

Spring also comes off very easy now.

This screws into the bolt using a 1/16 allen key.

This is only to be used with the 2.0 bolt and 2.0 super set bolt.  It will not work with any other luxe bolt