Being phased into production November 2015, this blue bolt replaces the gold bolt as the standard armature to the bolt system. There is no performance difference between the two parts, the only difference is that the main bolt sail o-ring on the blue bolt is a 17/70 where as the gold bolt uses a 16/70. The reason for the change was to reduce the overall number of different o-rings in the bolt system.

Shocker RSX – Blue Bolt – SHK109B