I have finished assembling and painting my M36B1. All that is needed is add the crew members to the turret.
Inspired by the assembled kit shown on Rubicon Models' site (see below), I didn't give it any thought about the muzzle break. You get a choice of two different muzzle breaks, and I was only focused on the type used during WW2.
However, I recently discovered that many sources suggest that the muzzle break was rarely used on the M36B1 for one reason or another, and the few actual WW2 combat photos I'm able to find confirms this fact. Yes, there are a few pictures showing the muzzle break, and there is a nice picture of a M36B1 with the muzzle break in "US Tank Destroyers" by Squadron Signal, and this picture is in almost all my books that has information about the M36B1, but the photo captions says, "The M36B1 was classified as a Substitute Standard and proved to be an easy way to quickly get additional 90mm guns into the European theater. The 90mm gun could be fitted with a muzzle brake, but this was rarely seen during the war due to the time involved in fitting it and its related equipment." (p.19, US Tank Destroyers, Squadron Signal)
Even though I have finished my M36B1 model (except for the crew), I am pondering the idea of making a modification to the gun's muzzle. Since it was not common for the M36B1 to have the muzzle break, I am thinking of removing it. In fact, I know I will. It shouldn't be all that difficult to make this modification, but has anyone else preformed this procedure on their M36B1 model?