This is a v2.1 alignment kit for the M4 platform, configured with the Protec-Mk2.5 engine and the Begadi Neptune Pro hop-up. It is used to square the internal assembly and ensure that the nozzle and hop-up chamber work with the correct seal, preventing air leaks in the ICS platform.
The kit is designed for M4 replicas using the Protec-Mk2.5 engine. During assembly, it is necessary to check the hop-up alignment, verify the nozzle travel, and ensure there are no interferences with the upper body of the replica.
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