[Styrak]

Do you mean HK45? And the "Umarex" HK45 is really just a KWA HK45. They're good guns though.

As for FPS, the TM M&P is likely measured with duster gas which has a lower pressure, hence the lower FPS. Stock TM pistols on propane are around 300fps. Stock KWA pistols on propane are around 320-350.

I hope you don't intend on ordering the gun from Ehobby though (outside Canada).