The Reinhardt figure was simple enough to do.

Headplay head sculpt.
Body.
Bendy hands.
Jacket from a animated film character.
Trousers from BBI.
Boots DAM Spetznaz.

The Hard work was his belt set Holsters and twin Berretta Samurai pistols with blades.

The pistols are 2x M92s with working top slide and removable mags. Both still function.

I made the:-
Front Compensators.
Plasticard made the new the top slide.
Pistol grips sculpted.
Also butt plate of Magazine.
The blades are Actually Metal and etched the Japanese characters onto the blades as he has in the film.
Then made the lugs for securing to the holsters and added them.
As you can see they are fully functional.

The holsters themselves are based on the actual ones designed for the film and I built from plastic card making strap holes for belt and thigh straps.