The gel surface is tacky so airsoft BBs stick to it and gradually roll down into the airsoft BB collection tray. Collect and re-use your most professional quality ammo to dial in your airsoft sights without wasting rounds. Set the Zombie Hunter gel airsoft target out on a flat surface and challenge your friend to a game of accuracy, or start your training for the upcoming zombie apocalypse. So, go ahead -- make it yours today and order up your new favorite Military Style Airsoft M4 Assault Rifle and let the fun begin!