https://www.atrrs.army.mil/atrrscc/courseInfo.aspx?fy=2012&sch=071&crs=010-ASIB4&crstitle=SNIPER&phase= There's the numbers. Granted, those numbers go down considerably due to drops but overall you can see the numbers. Yep, you're right about any branch of service attending, however when we went I don't seem to remember another branch there. We were all 11B and 5 EOD techs. Marines have their own school (but have exchange programs with the army) and most SOCOM units send their operators to SOTIC (Special Operations Target Interdiction Course). Out of my recon platoon 10 of 12 men were B4 qualified. Nearly every other recon platoon in the regiment had the same composition.