I'm guessing you specified dash 4 because actually want these three features: square butt, forged hammer & trigger, and drilled & tapped under the rear sight. Although the SCSW writes that drilling and tapping for a scope was part of the dash 4 engineering change, drilled and tapped dash 3s are common and so far as I know all 4" heavy barrel dash 3s are square butt while most dash 4s are round butt. My pointer is to rewrite your WTB specifying the features you want and include both dashes as options.
I'm sorry to bother your thread if my guess was wrong, but at least you got a bump to the top.
