Ok my friend deleted the vid on his youtube but...
Here is a better example, this is exactly how our breach load systems work the only difference is ours have bolt action breachs.
This is just one of the many options for projectiles, we have found that nerf mini footballs work the best for airsoft. You can buy a 4 pack of them at walmart in the party isle for like $2.00 which isn't bad. p.s. make sure to glue the fins on the mini football the air pressure will blow them to hell otherwise!