These are a lot of fun!
No PAL required.
http://store.prophetriver.com/crosma...450-fps-4-5mm/
Be sure to stock up on BB's and CO2 for these:
http://store.prophetriver.com/crosma...tainer-2500ct/
http://store.prophetriver.com/crosma...rtridges-15ct/
https://www.youtube.com/watch?v=n6BOdPxdz98