As the name suggests, a grenade pouch is an easy-access holster for your throwing explosives. It is designed to keep grenades perfectly safe while not in use and in no danger of falling out
Your pouch should be securely attached to your belt or body armor, on your dominant hand side. Ideally, this would be a semi-permanent attachment and with a secure covering.
Grenade pouches can be bought online. UARM offers holsters for both thrown grenades and launchers with durable materials and attachments.