The S63 is the most advanced Planet Eclipse barrel system yet! Introducing the Eclipse PWR Inserts and 3-piece construction, the S63 offers exceptional shot consistency, precision and control. This S63 barrel back is part of the S63 3-piece barrel system that is standard with the Gtek 180R and is compatible with all other parts of the S63 barrel system.
S63 Barrel Back Compatibility:
+ S63 Pro Tip
+ S63 Tactical Adaptor
+ S63 Tactical Extended Adaptor
+ Eclipse PWR Inserts