if it's the 98DA(double action) probably few, if any of the parts are interchangeable with the hi power with the exception of the magazines(conflicting reports on those). the 94 being SAO however would probably be able to share many parts...
this is all conjecture on my part however, I do not own an arcus or BHP though I have seriously considered the 98 several times.
ignore my complete lack of capitalization. I still have no problem correcting your grammar.
I never said half the stuff people said I did-Albert Einstein
You can't believe everything you read on the internet-Benjamin Franklin