The 50 round drum does not jam. Because back in the early nineties , Ruger built the p series "like a tank"


Gun review magazines has said this about ruger for years about the p series 


It feeds any kind of a 9mm around the world.


50 round drum


15 round mag


If interested semi your phone number and I'll give you a call.


Not willing to negotiate price.


10 round mag


Carrying case.


Included speed loader for drum.