Yes.the butt Frame is square,but as you know,Colt stocks that fit these models,extend beneath the bottom,and their wood in in the round butt configuration. I think this was done by Colt to save production costs,and the only 2 Colts that I can think of,that had "stocks" the same length as this short grip frame,are the Courier,circa 1954 and the Agent. My Courier,in .32 w/"warm handloads",isn't bad to control,with a grip adapter,but I fired a pals early Agent,and with regular .38 Specials,its a "squirmer"! Bud