Yah, but its one tenth or better of the cost of a transferable example.
Have you actually shot one? Unlike a water cooled belt-fed, far less is lost in translation. Besides, BRENs were select fire, so just imagine you're doing sustained and contolled fire, versus "hosing down" the teeming hoards of paper and trash targets.
Besides I've seen plenty of Maseratis puttering around the village at about 30mph (not all at once, though!). Why bother driving it at all? Just stay at home.
ETA: I know of an activity that's MIGHTY fun w/ a semi-auto BREN- 3-gun/CQB/"tactical" matches! Show up w/ one and figure out how to shoot it on your hind legs, as well as doing rapid mag changes. For a bit of an added challenge do it LH...