They are releasing the NEW 12v gem seried with a really good plastic that won't break even when hit with a hammer, just wait until then and you are good to go.
On the otherhand I have a gem series and have never had any problems with it, and you can go to dropzonepaintball.com and order new shells for $15 if you break one.
My other recomendation would be: don't fall down.
"Giving somone a Lapco Barrel is like giving them an STD, and then once you have one they are even harder to get rid of." _Seraphim
Chrome Retro Eclipse Minimag
Flatline 68/3k system
12" Smart Parts AA (the best)
Konig-Revo/Warp/Inteli Feed System