The  P799A is an airsoft gun than can packs a real punch. This full sized spring airsoft shotgun features realistic pumping action and is fitted with a scope and laser for easy aiming.uses standard 6mm sized BB's. It even comes with a small bag of ammo making this a great value.this shotgun has no mag to fill you fill the gun out from the top it hold lots of bbs around 50 to 75 per load