This won't be as nice as the e-Luder's TM HK45 thread...
Airsoft is more about shiny object for me nowadays, and I guess having seen more of these newer HK on TV/movies(John Wick was pretty sweet for HK commercial) means I kinda want one.....
As to why going KSC/KWA instead of TM, I always liked their USP anyway, so I figure I stick with that. RA-Tech makes a pretty sweet steel slide kit too...
HK45 vs USP, the ergonomic is much better IMO. The grip is more of a comfortable size(I am using the M back strap too).
With their threaded barrel, which they made in 16mm+ thread as opposed to their TM version 14mm- thread. KSC's USP Tactical and MK23 has the same thread in the past.
My experience with steel slide on the older TM Glock is that you can make them cycle but not that great. Needs a heavy spring to make it snappy and they have horrid gas mileage. I get maybe 40-50 rounds with 1 gas charge and usually you can't get any locking back on empty. Well this one has been pretty interesting, when I first shot it seems to cycle alright. But recoil spring seems to be on the light side. I have some spare Hi-Capa spring around(I think its either Guarder or Airsoft Surgeon) so I use that, cut it to length, drilled out the plastic bushing/buffer thing that the gun came with to fit the larger spring diameter and made a seperate Aluminum piece to make sure the collapse recoil guide assembly bottoms on the buffer as opposed to the bottomed out spring(spring length is cut short also).
This seem to make it return much more readily with a satisfying clank.
Shoots alright too.
Normal outer barrel
https://www.youtube.com/watch?v=P8Hv8iD3fn8
With a King Arms mock MK23 can
https://www.youtube.com/watch?v=B6-Y3yq56fU
Both at room temp, with fresh mag, fully loaded at 29 rounds.
Well I was pretty impressed with this altogether. If I get a new airsoft thingy once a year and they are all this nice I guess I can keep chairsofting a bit longer...
Only wish, I hope someone makes some aftermarket night sights for this. TM now has Gunsmodify and Nine-Ball stuff, the stock KSC/KWA doesn't have any to choose from. Unlike their Glock also I you can't use RS sights neither(I've tried on the USP, was a messy experience).