I dont believe that the Special Forces will ever be able to construct a round that is both sub sonic, and armour penetrating. Because of the
circumstances in which SF are often deployed (ie into situations in which opponents are tooled for bear and armoured up) a round which does not
penetrate armour is going to be next to bloody useless. The only real way I can see of penetrating armour with a sub sonic projectile, silently, is to
use archery rather than firearms.
You see, if you want to penetrate armour but do it relatively slowly, then what you have to do is increase the amount of weight in the projectile,
and construct it so that it delivers maximum kinetic impact, over the smallest possible impact point,and crucially delivers its wieght directly into
the target, every time. If you consider that a subsonic bullet, as they currently exist, weighs a damn sight less than an armour piercing arrowhead
and shaft, then you see the problem right away. There is not enough weight in a bullet, not enough kinetic energy at sub sonic speed, to do the job.
However, I wonder if there might not be a solution which uses current rounds, but means a modified or custom made weapon will need to be constructed,
or commissioned. The metal storm system, which any fans of modern weaponry will know of, did contain, within its range of possible applications,
pistols with many barrels. If these could be made to fire the subsonic ammunition, the WAY the rounds are delivered could be the answer to the armour
Watch this video from 3:05 onward. Now, I know that this pistol is firing non sub sonic rounds, but the interesting thing is its ability to deliver
many rounds, to a very small target location, in very quick succession. If I remember correctly, this thing will chuck three or more rounds before the
recoil sets in. Its that fast. If three times the weight of lead, hits the same area near enough all at once, THAT might be enough to penetrate
personal armour, even at the reduced speed, because you are essentially throwing a lead spear at the target, because thier impact all happens so
damned fast, its like a single massive round, striking one place.
The reason that I say a special custom job may be required, is that metal storm, again, if memory serves, went bust or quit trading at some point.
Also, special forces have very unique requirements in terms of the specs of thier gear, that have more to do with ease of use and speed of use, than
they do about how silently they operate. Its just a thought. Of course, they could just resort to modernised repeating crossbows, but they arent broke
and dont need fixing, so theres little money in such a thing for the MIC.
edit on 23-11-2012 by TrueBrit because: Added detail for