I feel that there should be like scopes and silencers, and grips and stuff, but make sure they are kinda debuffed, like when you use a scope in direct sunlight, it kinda reflects, like the light a flashlight, but there are upgrades to made the reflection dimmed but not completely eliminated, so if your camping in a bush, the enemy players can still see you, making it fair, rather then dying to a player you couldn't see, making it pretty hard to kill them before they could kill you. Silencers should make the gun quieter, but not completely silenced so it isn't a super high advantage. Grips, I can't think of any debuff for them, like, all they would do would be to make you aim less all over the place. Another idea, making upgrades in your house like a tread mill, which lets you run faster by like 2% and put it in set of 5 tiers or a set of weights ora backpack which progressively gets either a bigger selection of weights or a bigger backpack which would increase the items you would carry by like, 5 items, but the last upgrade could be instead of 5 items, carry aextra weapon, and make it so there would be 7 tiers.I cant think of any more ideas, but if I do ill post them. Thanks for reading and hope to here other peoples suggestions cause I want this to be a successful game (not that I'llget to play it often, I'm a PS4 player, only can play it at my friends house)