JOHNNY GLOCKS UMBRA DROP-IN SHADOW SYSTEMS GLOCK TRIGGER SYSTEM

UMBRA DROP-IN TRIGGER SYSTEM for SHADOW SYSTEMS

$290.00

Shipping calculated at checkout.

In stock, ready to ship
Backordered, shipping soon

Quantity

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 a Shadow Systems firearm 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, in the 43, 43x, 48 Gen. 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.

Q. Are there installation instructions?

A. In-depth instructions and video installation found here 👉.

PRESS

Mentioned in Recoil: Concealment Magazine Issue #45, August 2025, in an article by Steven Kuo titled

“Piercing the Iron Curtain.” The article spotlights Shadow Systems’ new California-compliant pistols and gives a big shoutout to the newly developed Johnny Glocks Umbra Trigger Kit — purpose-built for the MR920, XR920, and DR920P platforms.

The new Johnny Glocks Umbra trigger kit is a complete replacement and will be in their Combat style, with no separate Competition kit. The flatfaced Vex Duex trigger shoe is new, featuring a longer safety dingus with improved fulcrum point and a reduced power spring. There’s also a reduced power firing pin safety spring and three firing pin springs (4, 4.5, and 5 pounds) to dial in your desired feel. All the components are OEM from Shadow Systems and worked over by Johnny to deliver the trigger pull you’ve grown to expect from him. The modified firing pin is an optional upgrade. We installed the complete kit in the MR920, swapping out the firing pin spring to achieve a 4-pound trigger pull. It’s super clean and smooth, with a crisp break, no overtravel, and a short reset. -Steven Kuo, Recoil: Concealment, Issue 45

Read the summary 👉.

DISCLAIMER

This product is not manufactured, authorized,endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.

WORTH ADDING

THE LINEUP

Amazing as Usual !!!

Got all my Glocks outfitted w the JG Combats and now my Shadows w the JG Umbra’s !!! DAM !!! Couldn’t be happier 🔥🔥🔥 Thanks Mr Johnny 🤜🤛

Another incredible trigger by Johnny

If I could give 6 stars I absolutely would. I don’t usually leave product reviews but this definitely deserves it. All I can say is WOW. The factory Shadow Systems trigger isn’t terrible, but it absolutely could use some help, and Johnny’s full Umbra trigger kit delivers. It turned my XR920 into a finally tuned machine. The Vex trigger shoe, the shortened take-up, the glass-sharp break, the lightning-fast reset… every part of this setup hits harder than the stock trigger ever could.

If you’re debating it and have the means to do so, stop hesitating and buy it! You will not regret it. Huge thanks to the johnny and the team. this trigger kit absolutely blew me away.

Finally!

I'm glad that someone finally took up the challenge of giving the Shadow systems pistols a fair chance to compete in the marketplace. The Umbra trigger is just what it says it does: A good wall, crisp break, short reset, and minimal creep. A few disadvantages: 1) they really have no instructions with the product. This is not a huge deal, but I would have liked a set-up sheet explaining what each option does. 2) The firing pin safety spring was making an annoying noise when you were pulling the trigger. I discovered it was the spring catching on the beveled area inside the pin safety. I was able to radius it better and make the noise stop. Now it is like butter....

DR920 Trigger Upgrade-Amazing!!

Recently purchased the Umbra trigger upgrade for my DR920 Elite. This is the trigger system that Shadow Systems should have originally installed! Night and day difference in the quality of trigger function and operation! So impressive that I purchased another one for my other DR920. Highly! Thank you Jonny for your amazing products!!

Awesome

This trigger takes your gun from good to great! If you can afford it don’t hesitate to buy. Install was a breeze and I think the peace of mind of safety and reliability make it worth the money. The trigger is definitely what shadow systems should have been out of the box.

1 2

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.

REVIEWS

★★★★★
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.

UMBRA DROP-IN TRIGGER SYSTEM for SHADOW SYSTEMS