Delta Force already has the hk 416. I don't see the need for it to be in another regiment. Every regiment has its own unique classes and weapons. The m16a3 is already a gun you can buy from the store. Most of the guns you have listed are ones that can be bought. If all the guns are ones that I can just buy, then there really is no point in being in it in the first place. You also haven't listed the amount of hp for the fire support and the sentry. I'm assuming the sentry is like a sentinel. A sentinel having a medkit is pretty op since you have extra hp, but it's not really Much of a difference. All the special classes get unique special weapons. Not many people would join the sentry class if they only had a pkm compared to the other special classes who have flamethrowers, dart guns, hk xm8 etc.