GST-9 Pistol Frame The GST-9 V1 became a standard for the market for 80% frames when it was first released in November 2019. It offered a modular grip system while still being compatible with Gen 3 G19 parts. With the new GST-9 MOD1 frame, we've lifted the bar once again after three years of customer input and thousands of rounds fired!For improved controls throughout the recoil...