While it only pertains to domestically manufactured firearms and does not distinguish between those sold to civilians and those sold to military/LE, the following might shed some light on the issue:
http://www.atf.gov/files/statistics/...ort-report.pdf
As of 2011, there were about four and a half times as many semi-autos manufactured in the U.S. as revolvers (2,598,133 vs. 572,857). Ruger made the most semi-autos producing 612,970 between its Arizona and New Hampshire plants. Following Ruger in semi-auto production was Smith & Wesson at 406,151, Sig Sauer at 357,728, Taurus at 114,132, and Kimber at 104,303.
For revolvers, S&W led in production at 237,646 followed by Ruger at 193,025, Heritage at 68,186, North American Arms at 39,465, and Charter Arms at 23,845.