Berettas are definitely among the champs when it comes to a low profile. I believe the Cynergy was initially promoted as the shallowest of all mass produced guns. The Merkel is pretty much on the other end of the scale. The receiver is quite deep, which some people don't like. But in spite of that, they've managed to keep their OU's pretty light. They also use a very slim, 3 piece forend which helps to keep the weight down.