Umbra Drop-In Trigger System

Johnny Glocks' Umbra Drop-In Trigger System for Shadow Systems

The Umbra Trigger System from Johnny Glocks is the first drop-in trigger system developed specifically for Shadow Systems pistols. It consists primarily of original Shadow Systems OEM parts that have been professionally reworked and tuned by Johnny Glocks.

Compatibility

Suitable for Shadow Systems models in the MR, XR, DR, and Foundation series (e.g., MR920, XR920, DR920).
Not compatible with CR models (e.g., CR920).

Technical Specifications

Pre-travel: less than 6.35 mm

Feedback: clear and well-defined

Trigger: fast and crisp

Trigger pull: adjustable between approx. 1.25–2.04 kg (2.75–4.5 lbs)

Over-travel: zero

Reset: short, fast, tactile, and pronounced

What’s Included

Complete trigger assembly (Shadow Systems OEM trigger housing and trigger bar) with connector and trigger spring

Three firing pin springs: 4 lb (green), 4.5 lb (orange, recommended), and 5 lb (yellow)

Firing pin safety with reduced spring force

Hex wrench and spring configuration chart