Remington R51: First Look Inside Out

barnbwt, who frequents The High Road forums, has detail stripped his Remington R51. You can read about it in this thread on The High Road.

R51 Inside Out (image by barnbwt)

He alao ran a finish reamer into the chamber with interesting results. He describes that n the same thread. The finish reamer took out enough metal to confirm our hypothesis that the chamber is severly undersized. The chambering is more like "9mm Remington (a previously unknown chambering) than 9mm Luger as marked.