I used to work for them. Nesikas at one time enjoyed a rather prestigeous reputation.
Back then they were about the only game in town for things like EDM cut raceways and one piece bolts.
Nowadays its much more common.
The actions ars made from 15 5 ph ss. Bolts are chromoly. A 1.470 od model M is typically meant for heavy magnums like the 338 Lapua. The bolt will be .75od instead of the usual .700.
Tennon threads are 1-1/16 x 18 instead of the more common 16. Important for your preffered gs to know.
The actions are vulnerable to galling if certain rules arent adhered to. 15 5ss doesnt get super hard and its not nearly as slick as some other types of ss.
I still build on a few of them. Dakota Arms owns Nesika now. Has since 2003. Parts are still available so if you get one they csn support it.
Good luck and hope this helps.
C.
Its not necessarily a show stopper. Just have to treat it differently.