The Load Bearing Vest (LBV) Expander Kit is designed to augment the 34A Split Rig Chest Rig Chassis by adding more storage real estate to the system. The LBV comes with a roll top butt pack, padded X harness system, and a sternum strap. It replaces the Back Strap and Fat Straps from a standard 34A Chest rig setup to create a fully functional platform for load carriage.

The LBV Expander kit can be easily attached or detached for quick chest rig configuration. By keeping both an Expander kit, as well as Fat Straps and Back straps on hand, the operator can quickly transition from a front-only system that is easy to use in vehicles, to a full-featured Load Bearing Vest that can store extra essential kit for sustainment operations and longer patrols.

The LBV Expander kit is also backed with a MOLLE attachment system. The harness and side straps are removable so that the Butt Pack can be used as a standalone module on other platforms. When not in use, the side buckle straps can be stowed behind the MOLLE using the integrated vertical slit openings.

The main compartment of the roll top pouch can be expanded to accommodate large items and is constructed with a DWR finish. However, it is not fully waterproof. If you are looking for a fully waterproof solution, Spiritus recommends lining the pack with a dry bag. The pouch also features a zippered front pocket with tie down loops for sensitive items.


Some images shown with optional accessories, sold separately.

If you are ordering for a MIL/LEO unit, please contact

Weight N/A

Multicam, Ranger Green