A comprehensive guide to installing the RogueWorx Zenith kit for the GHK G5 airsoft rifle as done by Stupid Airsoft. This upgrade is presented as a necessary fix for a known design flaw where the lower receiver tends to crack over time under the stress of the gas blowback system. By replacing the standard buffer and modifying the receiver, the kit aims to redistribute the mechanical force and save the rifle from an early retirement.

Classic Firearms go over the Zenith ZF-56, a roller delayed 5.56 firearm. Made from forged aluminum and featuring a blend of HK and AR-15 ergonomics, the ZF-56 offers ambidextrous controls, M-Lok compatibility, and a free-floating handguard. Available in both rifle and pistol configurations, this firearm is built on a patent-pending design and includes a cold hammer-forged barrel.

Another round of real steel fun with Garand Thumb as he works his way through a range ising the Zenith Z5P/Z5 which is a clone of the iconic Heckler & Koch MP5 SMG. This is made by the Turkish MKE Corporation whichh is a defence contractor that has been in business for over 40 years.

Another MP5 video from Polenar Tactical. Called "MP5 Operator", this shows movement to contact with the MP5 SMG. The MP5s used here are actually the Zenith Z-5rs which are based on the H&K MP5 design as the Turkish company got the license to manufacture the SMG. The pistols are also Zenith products: MC28 and ZIG PC 1911.

Polenar Tactical does some full auto MP5 Drills but using the Zenith ZR-5s which are basically MP5-style guns built by a Turkish Company called MKE using MP5 blueprints, Heckler & Koch tooling and imported by Zenith... "Zenith firearms brought us to Virginia where we had the chance to play with some of their 'toys'. :D

Their Z-5 series of roller-delayed blowback firearms are made on HK machines which reflects in high precision and reliability."