[The Saint]

Paintball use a striking system? That's the first time I've heard that. Sounds pretty unlikely, besides the fact that all the markers I've seen are pneumatic, considering how soft paintballs are compared to BBs.

As for a striker system versus pneumatics, issue of projectile intregity in the face of being hit with something solid aside, a striker will only provide acceleration for the duration it is in contact with the projectile while a pneumatic system will keep accelerating the projectile as long as it's in the barrel.