Zius BK1S/BK2S Dart Gate

The Zius BK1S/BK2S Dart Gate is a direct replacement part for the dart feed gate on both the BK1S and BK2S platforms, sold complete with its breech return spring so you are not left sourcing a spring separately to get it working again.

The dart gate is what controls the dart as it feeds into the breech on every cycle, so a worn, cracked, or spring-fatigued gate is a common cause of feed issues, jams, or double-feeds on these blasters over time. Swapping in a fresh gate with a new return spring resets that part of the feed path back to spec.

Since it is built for both the BK1S and BK2S, it is a safe pick regardless of which of the two you are running, and it is a straightforward internals fix rather than a full teardown.