Board Thread:Metal Gear Solid V/@comment-1783334-20150929162249/@comment-184.89.79.72-20150930021322

The medium suppressor tranq lasts all 30 (or whatever) rounds or close to it at least. With the infinite suppressor tranq you still end up needing supply drops for ammo that would give you an extra suppressor anyway (unless you're in that extremely rare situation where you find tranq rounds in the  field), plus it takes more plants and GMP to use so honestly I never find any use for it.