Another unboxing and test video by Redmantoys Airsoft covering the Armorer Works VX7310 Polymer80 With MOS gas blowback pistol. The Armorer Works VX7310 Polymer80 with MOS is a semi-automatic, 134A/Green Gas powered gas blowback pistol. It features a metal slide and a polymer frame, along with a metal outer barrel that has markings. The pistol is equipped with fixed front and rear sights. One of its notable features is the ultra-light recoil, which allows for crisp and agile blowback cycling.