ACTION OVERVIEW PRE-TRAVEL- <1/4TH" WALL FEEL- Defined & Solid BREAK FEEL- Quick & Crisp BREAK WEIGHT- 2.75-4.5lbs OVER-TRAVEL- Zero RESET- Short, Fast, Tactile, & Aggressive Umbra Definition: The complete or perfect shadow cast by an opaque object. Umbra in Context: A complete firing system designed to perfect your Shadow Systems pistol. The Shadow Systems platform has elevated the Glock-compatible firearm to a new standard. These high-performance handguns are purpose-built for combat and competition, engineered from the ground up. Due to their proprietary design, they operate most efficiently with components specifically crafted for the platform. With that in mind, Johnny Custom Glocks is proud to introduce the first-ever custom drop-in trigger system for Shadow Systems pistols—primarily constructed using their proprietary parts. While mass-produced firing mechanisms must account for broad manufacturing tolerances, a custom shop like Johnny Glocks can finely tune these systems to unlock their full potential. That’s precisely what the Umbra delivers: optimized performance and peak efficiency tailored to the Shadow Systems platform. Includes Full trigger assembly (Shadow Systems OEM trigger housing and trigger bar) w/ connector and trigger spring 4, 4.5 and 5# striker springs firing pin safety w/reduced power  spring, hex wrench, and spring configuration chart. UPGRADES STRIKER: Shadow Systems OEM w/assembly refaced, de-tooled, stoned, honed, and high polished; lug face surface 10,000 grit Watch it in Action Safety + Reliability Statement Every Umbra trigger from Johnny Glocks is bench-tested in live Glock and Shadow Systems platforms to confirm full safety engagement and mission-ready reliability. Each unit is manually verified for striker block, drop shelf, and trigger tab function—no automation, no assumptions. Umbra isn’t just an upgrade—it’s a precision tool built for operators who demand absolute confidence under pressure. FAQs Q. Which Shadow Systems models will the Umbra work with? A. Compatible with: MR, XR, DR & Foundation Shadow Systems platforms (such as MR920, DR920, XR920 models). It is NOT compatible with CR models. The Evolution X Combat or Competition, without the striker. is a superb drop-in trigger kit for the CR. Q. What comes in the kit? A. Everything, it's a full firing system! Complete Firing pin assembly (Shadow Systems OEM trigger housing and trigger bar), firing pin safety w/ springs, rear housing with receiver & connector, trigger bar and shoe. Q. Why use Shadow Systems parts instead of Glock parts? A. Shadow Systems proprietary parts are specifically engineered to work optimally within the Shadow Systems platform. They offer better performance, reliability, and compatibility compared to standard Glock parts.