I've been pretty sure they do, as all the others in the series have, but for some reason that 4 film pack is almost impossible to find in both stores and online. I've only seen one once, before I knew it might be necessary. Before I had to shell out for the set somewhere or the old singles I figured I'd see if Netflix still shipped the old discs, which thankfully they do.

BestBuy has it online for $13 shipped. The BD 4 film version is $19.

Also, the 4 film Lethal Weapon DVD set was the last to have the "Director's Cuts" of 1-3 with footage inserted and not reissued on BD. Additionally those are full bitrate DTS and sound lovely.