The Umarex ones are G&G internals with full trades externals.
CA makes MP5's.
VFC makes a GBBR one.
ICS Mp5's are great.
TM MP5s can be found are the best bet for internals IMHO.
Originally Posted by FirestormX
I know that isn't really what you asked, but it's the internet, and I like to type things that don't matter.