The additional back pressure from a suppressor will cause an increase in the cyclic rate of fire most full-auto weapons.

It would be nice if the Class ItemInfo of muzzle devices could have a coefficient to modify the reloadTime of the weapon.
https://community.bistudio.com/wiki/Arma_3:_Weapon_Config_Guidelines#Muzzle_accessories

Something like this:

class cfgWeapons {
    class InventoryMuzzleItem_Base_F;
    class myMuzzleAccessory {
        class ItemInfo : InventoryMuzzleItem_Base_F {
            class WeaponCoef {
                reloadTimeCoef = 0.9;
            };
        };
    };
};