Ran across this today while looking for other things. The most detailed explanation of the adoption of the Cutts Compensator, and the testing of the CUTTs compensator on BARs and other machineguns of the day. Very long, but a great read!! https://muse.jhu.edu/article/796400/summary I could not post the download as it is too big. I can email to someone with better computer skills. Enjoy Sandman1957