AR-15 lowers are pretty cheap. Seems like ~$60 on the cheap end at consumer (non-wholesale) prices. That's without a buffer spring and stuff, but I don't thin

AR-15 lowers are pretty cheap. Seems like ~$60 on the cheap end at consumer (non-wholesale) prices. That's without a buffer spring and stuff, but I don't think this thing even uses/needs those. There are some advantages to it, though. The article calls out accessories being interchangeable. The company doesn't have to make/sell different stocks and what not, people can just buy their existing favorites for the AR-15. The ergonomics are probably more familiar (e.g. adjusting the length of the stock, where the safety is, etc). You could also theoretically use the same lower for both this and an actual AR-15, although I doubt the utility of that. Most police departments probably have enough cash to just buy both.