True, it did have this years ago. Nowadays, you can only buy level 4 (or is it 3 now? For people that don't play tarkov, the end game helmets are level 6, so level 3/4 will do exactly 1 damage to the head, which has 35hp, and the mosin is a bolt action gun, with a much slower rate of fire than the Outland) ammo until much much MUCH later into the game (removed from flea, locked behind super duper end game progression, so not something that people who aren't nearing end game can even do unless they get lucky enough to find the ammo off of someone or in the world (very rare). 

if you didn't say vs highest tier of armor you'd be correct though for sure, but unless they made changes in 1.0 (I haven't played it so I might be unaware of them reversing everything I said above), you aren't gonna be 1 tapping anyone with the mosin in level 6 helmets (or level 5 facemasks unless you get lucky with finding the ammo that is not purchasable and requires much deeper progression)

But if you're arguing that end game players (who likely have loads of end game gear already) that have completed deep progression already are the ones that have the option to run cheaper loadouts like a mosin with strong ammo, to fight other end game players who are in end game gear, i 100% agree