These PWR Inserts work with both the SL63 barrels from Planet Eclipse and PWR Compatible Inception Designs Barrels. They do not work with other insert barrel systems from other companies.
The new system uses specially designed inserts that maintain all the easy ball entry features of the Stella barrel backs. This allows the use of a single outer barrel back that can be more cost-effectively matched to the gun and it's anodizing yet maintains all Stella barrel performance features AND is available in many sizes.
