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.
Estimated to ship middle of June 2025. Be advised, if you select multiple items to purchase, all items will ship out together mid-June.
Johnny Glocks is THE trigger upgrade. My friends always ask what trigger I’m running when we’re shooting at the range. The performance and reliability is unparalleled, especially after learning the trigger and getting it dialed in.
If I could leave more stars, I would.
Jackson D.
★★★★★
I am extremely happy with my new combat trigger. This was my first installation, but I followed along step by step with Johnny's YouTube tutorial. Had an issue with over travel initially, but it was addressed in the video and instruction card. It ended up being a fairly easy trouble shoot, and taught me how to adjust the trigger myself.
Took it straight to the range after for a test run. Zero malfunctions.
Highly recommend, and I'm sure I'll be picking up another at some point.
Dan M.
★★★★★
I did some rework on my Glock 48 and the trigger felt much better but then I installed the Johnny Glock trigger and it is fantastic! I am only giving them 5 stars because I can't give them 6! I ordered a Glock 19 Gen 4 trigger as well. It was easy and quick to install.
I have tried other products and did some work on my own also. This trigger is a significant improvement over the stock trigger and the work that I did.
Damian C.
TRIGGERS + ACCESSORIES
BEST GLOCK PERFORMANCE & UPGRADES
We take an amazing product and apply thoughtful, precise design choices that make our products the best upgrades in the industry.
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