Spiritus Systems Releases Assault Back Panel Core Mk 2

by Drew Bryant · April 1, 2026

Spiritus Systems has officially released the Assault Back Panel Core Mk 2, an evolutionary upgrade to its previous back panel design. Its design was refined with direct input from end users and built to better integrate with modern loadout demands.

Designed for seamless compatibility with UCAS and the LV-120 plate carrier system, the Mk 2 focuses on what matters most in the field: modularity, accessibility, and efficient use of space. The result is a streamlined back panel that offers increased internal capacity without sacrificing profile or mobility.

Refined Design, Built Around the End User

At its core, the Assault Back Panel Core Mk 2 is about adaptability.

The panel attaches via Spiritus’ proprietary Quick Attachment Tab System combined with UCAS-standard #10 zippers, allowing for fast, secure integration with compatible plate carriers(UCAS/LV-120). This system keeps the panel stable under load while still enabling quick removal or reconfiguration when needed.

Up top, a removable flap system gives users the ability to tailor the panel to mission requirements. It’s compatible with multiple Spiritus options, which include:

Back Panel GP

Flap Back Panel

Flashbang Flap

Back Panel MOLLE flap.

This design eliminates the need to run entirely separate panels for different roles.

Assault Back Panel Core Mk 2 attached to LV-120 plate carrier (Photo: Spiritus Systems)

Smart Utility Where It Counts

One of the standout upgrades is the custom double-pull, locking zipper system at the top of the panel.

It’s a small detail that delivers big functionality:

Allows users to route antennas, hydration lines, and cabling cleanly

Secures breaching tools or elongated equipment in a fixed position

Enables flexible load stacking and retention without compromise

Between the dual zipper tracks, Spiritus has also integrated MOLLE columns and shock cord routing, giving users additional options for external mounting and retention.

Configurable Without Complexity

The Mk 2 keeps things simple where it matters, offering three core configurations without overcomplicating the system:

Low-Profile Setup: Compressed, streamlined, and ideal for essentials like breaching tools, charges, and GP gear

Expanded Loadout: Increased internal volume, functioning more like a compact assault pack for radios, cold-weather gear, or bulkier equipment

Drop Expansion Mode: Adds lower extension capacity for longer tools and oversized items without compromising upper access

It’s a modular system that is scalable based on mission needs with slimmer profile to minimize bulk.

Spritius’ second generation Assault Back Panel Core Mk 2, offers end users a multitude of options on how to build their loadout. Below, is the full product details giving the complete rundown of the panels capabilities.

Product Description

Assault Back Panel Core Mk 2 (Photo: Spiritus Systems)

The Assault Back Panel Core Mk 2 is designed to be a multi-mission back panel attachment to your LV-120 Plate Carrier, and other UCAS Compatible Plate Carriers. The Assault Back Panel Core Mk 2 is both expandable and modular and can accommodate a series of equipment to meet virtually any operational need.

The Assault Back Panel Core Mk 2 attaches to your LV-120 Rear Plate Bag using a combination of our proprietary Quick Attachment Tab System and UCAS Standard #10 Zippers.

The newly integrated Quick Attachment Tab System allows the Assault Back Panel Core Mk 2 to affix to and off the LV-120 quickly and seamlessly.

The Panel has a removable flap system that allows the user to configure the upper half of the Back Panel to meet their mission needs. Compatible with Back Panel GP Flap, Back Panel Flashbang Flap and Back Panel MOLLE Flap. (Flaps are sold separately, the Assault Back Panel Core Mk 2 does NOT come with a flap.) This eliminates the need to have multiple panels and allows for quicker donning and doffing of mission essential equipment.

Different angles of the attached back panel (Photos: Spiritus)

The top of the Panel features a custom double pull, locking, separating zipper which allows:

1. Total user configurability to swap, stack and secure your mission-essential tools without compromise.

2. Communication antennas and other items such as cabling, hydration tubes and breaching tools to be routed into and out of the top of the panel with the locking zipper setting the tool in a specific position.

The Assault Back Panel Core Mk 2 is designed with three direction snaps to hold Flaps securely and to keep tools held inside the panel.

The panel can be worn in three configurations:

Configuration options (Photos: Spiritus Systems)

1. Configuration 1 uses the outermost zippers to attach the panel to the plate bag. This compresses the panel and allows it to be worn in a “light” configuration. Ideal for users who want a streamlined fit and only need to carry breaching tools, slap charges, flash bangs and GP kit on their backs.

2. Configuration 2 uses the innermost zippers to attach the panel to the plate bag. This gives the user greater capacity and configures the panel to act more like a small assault pack. This provides the same features as Configuration 1, but with the added volume for bulky items such as radios, cold weather gear, pole-less litters, etc.

3. Configuration 3 “The Drop Expansion Pocket,” utilizes Configuration 1) to attach to the rear plate bag and introduces the bottom expansion. This expansion offers the ability to carry longer tools and store even more bulky items in the expanded space.

Between the two sets of zippers, is a column of MOLLE cuts for mounting pouches, such as the Magic Stick, and has holes for shock cord to secure charges, braided tubular nylon or any other lightweight objects.

The Assault Back Panel Core Mk 2 comes standard with a permanently affixed large GP pocket on the lower half. This pocket is lined with a loop field for attachment of accessory items and features two tie-down locations inside the pouch for securing sensitive equipment. The front of the pouch features a zippered stash pocket for organizing smaller, commonly needed items. This pocket has an external 4” x 5” loop field for attaching identification patches. Behind the GP pocket is a hidden stash compartment, used for storing the lower half of slap charges or other items when they are passed through the flaps above. It can also be used to stash E&E equipment or smaller personal items.

To fold the main bag tail extension back into the Assault Back Panel Core Mk 2 body, stuff the extension into the panel and re-affix your directional snap straps. These straps are now wrapped around the bottom of the back panel, which allows you to secure it in place if a heavier load needs to be carried inside, but you do not want the expansion to deploy inadvertently.

Availability & Pricing

The Assault Back Panel Core Mk 2 is available now in Black, Ranger Green, and Coyote Brown, with an MSRP of $219.99.

With this release, Spiritus Systems continues to double down on what it does best, building modular systems that evolve with the end user. The Mk 2 isn’t a reinvention. It’s a refinement. And in this space, that’s exactly what matters.