Hear me out. In a lot of games, guns tend to be very overpowered, and this mod (as well as most other gun mods) are no exception. Rimworld has a piece of equipment that blocks bullet fire from damaging a pawn, at the drawback of not allowing bullet fire to be returned. I think that would be a good idea to add.
The shield can take up to a certain amount of damage, before the shield breaks, and you are vulnerable to bullet fire for a time. The amount of damage blocked it based on the players max health, and is unaffected by damage resistance buffs such as protection (bullets are still affected by damage buffs, but no crits). the shields durability is also dependent on the quality, so a base quality belt would be 30% of the players max health, could jump to 70% of a players max health for top quality. After the shield breaks, it goes into a recharge phase, where it needs to fully charge before the shield reapplies.
The wearer also can not fire out of the shield, forcing the wearer to use melee unless the shield breaks. If a weapon is fired from the player using the belt, the attack hits the shield, as if it blocked an enemy. The shield does nothing to block melee damage, both incoming and outgoing.
I just really think more ranged protection trinkets would be a good addition.