[rudedog]

I own both version of the guns mentioned. ( semi auto )

The Thompson packs a punch but is much heavier and is not as accurate as the MP5. I do not know how someone carried the Thompson with extra clips. For a prolonged time. The nice thing is the cal. ( .45 ACP ) is a very good stopping round and will not travel beyond a room or through a person.
Were a smaller caliber like the 9MM parabelum(spelling?) can exit a victim when not using hollow points.

The MP5 is probably the worlds best anti terrorist / SWAT weapon in use today. This gun is so reliable and accurate. I can hit a reactive metal target at 75 yards over and over again without any recoil what so ever. Threw iron sites. ( can't see the laser pointer at that range during the day )

But as for fun factor, you can't beat the Tommy gun. My 10 year old daughter loves shooting it at the gun range. ( getting her ready for dating )