The Brits used both commercial and mil actions for their magazine rifles. I've seen Holland's with both. The correct barrel and action finish is a traditional rust blue (NOT a matte "rust like" blue!). I've also seen other makes use a carbonia finish on trigger guards such as used on the trigger guards of doubles. As for triggers I've seen mostly a reworked military/commercial trigger on the the vintage H&H pieces and I've seen aftermarket triggers on newer rifles.