Elite II Jacket 100 Litre How do I mount this

How do I mount this to my rifle

unlike basic water-resistant containers

and Hammocks Collection:

Quality made in Germany since 1893

Point Type: Drop

Elite II Jacket 100 Litre How do I mount thisKombat UK Elite II Jacket Lightweight Outdoor Jacket The Kombat UK Elite II Jacket is designed specifically for UK campers, bushcraft enthusiasts, hikers, and outdoor adventurers across Britain. Also suitable for military personnel, British cadets, and airsoft enthusiasts. Made for UK conditions and available exclusively to UK customers, this lightweight jacket from our Men's Jacket & Coats collection features weather resistant construction and