The most important item in all OSRS gold archer's gear is the backpack companion called Ava's Device. This device automatically takes all the ammunition that is on the ground for you. If you're thinking of increasing your Ranged proficiency and are planning to use expensive ammunition this is must have.
Ava's Devices offer the best benefits to ranged skills from all cape slot items, they save you both money and time due to automatic pickups. In addition, they also draw random objects to your inventory. This item can be obtained by completing Animal Magnetism quest which requires the completion the Priest In Peril, Ernest the Chicken and Restless Ghost quests. You'll also require level 18 Slayer 19 Crafting, level 18 Slayer, 30 ranged and 35 woodcutting. There are three different tools available.
Avas Attractor : If you are less than level 50 in your Ranged skills, you'll receive this one as a reward from the quest. This piece of equipment picks up 60 percent in your ammunition. The 20% that it is broken (which is standard for all ammunition types) and 20 percent of it ends up lying on the ground. It also adds a bonus of 2 to your accuracy in the Range.
Avas Accumulator the level 50 mark, if you already have cheap OSRS GP an Attractor, visit Ava and upgrade it by offering them 75 steel arrows as well as 1000 gold. If, however, you've finished this quest before hitting 50 Ranged you'll get this upgrade right away, with no extra payments. This improved version will boost the its rate of ammunition collection from 60 percent to 72%. The upgraded backpack has also added +4 Magic Defence and +4 bonus to Ranged Accuracy rating.