Was always tempted. I managed to get a traded spring one recently. Maruzen ppk is nice. Only thing is they are a little delicate but then is the ksc 230. I have the nbb maruzen ppk which is solid and shoots well. Makarov wise your best bet is the WE and if you want a traded one ky Airsoft. I think my favourite is the Walther tph though which I have a springer of.
or the tm revolvers are respectable. Easy to find , not as solid as a tanaka though . I'm a fan of the co2 kwc colt pythons I can let the off frame shape off for the fact they are easy to get, cheap, really robust and have a hop.
Really can't beat the new TMs . I've had a few discussions with TM capa lovers on the TM pistol group who still insist that the capa is best. Despite it being 15 odd year old design and not trying any of the newer 15mm bbu models. Abundance of spares and nice trigger I'll give it that, but lacks in many more important aspects. Especially cold weather efficiency/performance which for me is paramount for me.
I've done it on a od kjw lower. Think I calved it first an sanded. Most are the same colour all the way through afaik. Also cut the dust covers so they fit serpas.
I haven't seen it fully put through it's places. It has got the 15mm piston in it's favour. I did notice when I had the black and a silver 226 years ago the metallic finishes do suffer cool down more. That said you could get a black one. Otherwise there's the uspc if you want a similar size pistol hammer fired pistol that you can rely on.