If the UMP is lighter, cheaper, more modern and in more calibers than the MP5, why do so many organizations use the MP5 and not the UMP? - Quora
HKPARTS.NET - | MP5 VS. UMP | Which is your preferred & why? 😎🔥 PC: @10_8guns Build: @omega_guns | Facebook
![Now that we know more about gunsmith, could we, in the future, get a receiver swap for the Lachmann Sub into the Lachmann GUD1(HK UMP45-Just like Old Times)? They look and function Now that we know more about gunsmith, could we, in the future, get a receiver swap for the Lachmann Sub into the Lachmann GUD1(HK UMP45-Just like Old Times)? They look and function](https://i.redd.it/hqdc78ochsq91.jpg)