Why shouldn't the arms-companies use Outerra to test their weapons for free virtually (as opposed to having to buy the weapon material and ammo), provided they build the specialist physics?
If Outerra was to incorporate Blade Element Theory, environment would have the correct effect on munition flying through the air.
The functions are made out of real gun exercises, a lot of things too complex to be rightfully simulate, the PC stuff handles so the gun parts itself (thermal stretch, stability to thickness, pressure reliability calculations) ... just the stuff that til the 80-90 were done by drawing schemes and hand calculating in circles, nowdays they do it in 3D software. Just makes a model, tests the parameters it should hold and makes differences til it seems to be right, still a real gun test is irreplacable. The balistics could be used mostly only in shooting sims, just like the Spectrum (mostly for air and land technic, but based on real arms balistics/behavior) :
... many army schools were equipped whyte small-arms and AT handheld sims too, just like these saab systems, just russian made (there are pics of russian ones in use, doe hard to find) :
http://www.saabgroup.com/en/About-Saab/Meet_Saab/2011/ITEC-2011-Cologne-Germany/ ... so it seems, it would be needed to contact the companies for that infos, and many may not like to speak about that kind of stuff. Certainly, because thse mil-sims are their own, or parent group companies products - gets into theyr pockets, given to army-bases whyte arms-sells in one package.