That was with my M23 in stock form using propane and 0.28g Bastards. Easy 150ft out of it.
As for ability to find replacement parts, UNC has a pile of the stock parts.
BTW, read my review on airsoftparts.com under the Airsoft Surgeon 380 kit (
http://www.airsoftparts.ca/store2/in...reviews_id=22). I think it might only be useful in warm weather, but in my basement my fps went from 315fps down to 280fps.