I'm in a predicament, .40 S&W UMP or 10mm MP5K?

[mkdhotrod]

HKparts has a sale going on.
I already have a
AP5P SBR
Vector V89 MP5/40 SBR
and a converted AP5SD

Im honestly leaning towards the UMP in .40.
What say yall?

 

[madmarinehays]

Thread 'FS/FT Ump 45acp and 40s&w brace and stock' https://www.theoutdoorstrader.com/threads/fs-ft-ump-45acp-and-40s-w-brace-and-stock.3958471/

 

[basstracker89]

10 would be more efficient. 40 ammo might be more available

 

[joeldworkin307]

10mm reverse stretch

 

[jokies838]

Since you already have multiple MP5 variants, the UMP would add more variety to your collection. The ergonomics are a bit different, which keeps things interesting