You can buy the pack here: https://www.tacticalloadout.nl/tasmanian-tiger-tac-sling-pack-12-carbongrey.html

Tasmanian Tiger – Tac Sling Pack has a 12 litre capacity and clever features. Backpack with one diagonal shoulder strap that can be worn on the right or left. One removable laser cut panel and Velcro tape for handgun holster in a separate handgun compartment as features. Organiser in the front compartment. Concealed zip compartment accessible from the back.

PRODUCT DESCRIPTION
Padded Back Carrying System;
Adjustable hip belt;
Side compression straps with lockable buckle;
Durable, reinforced handle;
Hydration system compatible;
Two large main compartments;
Zip-up front compartment with organiser;
Can be worn on the left or right;
Secret compartment on back;
Removable laser cut panel;
Laser cut PALS on the side and on the shoulder strap;
Handgun compartment; Velcro tape for handgun holster;

Measurements: 42 x 22 x 10 cm
Volume: 12 l
Weight: 1,00 kg
Backsystem: Padded Back-System (TT)
Fabric: T-Square Rip CORDURA® 700 den