caliburn one piece handguard

i just merged argus parts together so it print easier and faster. i removed the outer barrel from the barrel shroud part as we dont need it anymore. printing it that way help to print the whole things faster and will save a lot of plastic. you will need the front block from argus modworks and will require the argus foregrip too. you can get them here: https://www.thingiverse.com/thing:2601859