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you will need both GBB rubber and GBB inner barrel to make it work on your M4 AEG Include : 1 x CNC Aluminium Hop-up Chamber M4G
Adjust as needed
Precision details like the ejector-style release hook reflect craftsmanship ready for real-world demands
Onwards and Upwards
It has an athletic shape with a curved visor
Polarstar Kythera V2 M4 HPA Engine emersongear you will need both GBBThe Kythera has been the most eagerly anticipated products from PolarStar in the past decade. This HPA system is a radical departure from all previous systems that PolarStar has produced since the Kythera does not use a battery, an FCU or any type of electronics. The Kythera is completely mechanical. This means you never have to worry about charging batteries or work with delicate electronics. It also means that the system is completely waterproof.