Karrimor recon 40 litre rucksack the karrimor recon 40 litre rucksack is a highly versatile assault pack with a clamshell opening compartment easy access is provided thanks to four zip pullers and fully opens the pack the front of the bag features a compartment to store any items and benefits from internal compression straps and a padded internal pocket the bag benefits from a hydration system compartment that makes it ideal for long treks rucksack 40 litre clamshell open