You can get this item after completing the Animal Magnetism quest which requires completion of Buy OSRS Gold Priest of Peril, Ernest the Chicken and Restless Ghost quests. You will also need level 18 Slayer 19, 19 Crafting, 30, ranged and 35 woodcutting. There are three different tools which you can buy.
Avas Attractor : If you are at or below the level 50 of your Ranged skill , you'll be awarded this item as a reward from the quest. This piece of equipment will take 60% in your ammunition. 20percent of the ammunition is broken (which is the norm for all ammunition types) and the remaining 20 percent is left in the ground. It provides also +2 bonus to your Ranged accuracy.
Avas Accumulator - After hitting the level 50 mark, if you already have an Attractor then you can go to Ava for an upgrade by offering her 75 steel arrows and 1000 gold. However, if you've completed this quest after hitting 50 Ranged, you'll be able to get the upgraded version instantly without the need for additional payment. This improved version will boost the pickup rate of your ammunition from 60% to 72%. The upgraded backpack includes +4 Magic Defence and +4 bonus to the Ranged Accuracy rating.
Avas Assembler Last but not least we have an upgrade that requires completion of Dragon Slayer 2 quest. By bringing Vorkaths head, along with 75 Mithril Arrows you can upgrade your backpack again. While the most effective version has rather large requirements, it's certainly worth it to purchase.
You won't shoot any rounds on the floor since this is able to Buy RS 2007 Gold pick it up. 20% of it may continue to break but it's always an improvement. It is also the best in slot item for the Ranged cape slot because it gives you +2 Ranged Strength, +8 Ranged Accuracy and gives +1 to each Defence stat, excluding Magic which gives +8.