Customizable Weaponry 2.0 Little help with model changing

Im trying to make this model active on my gun yet i want it to be disabled if a sight attachment is place on



SWEP.AttachmentModelsVM = {
		["md_default"] = {model = "models/attachments/ironsight.mdl", bone = "weapon", rel = "", pos = Vector(0, 14.729, -4.572), angle = Angle(180, 180, -0), size = Vector(1.095, 1.095, 1.095), active = true },
		["md_saker"] = {model = "models/cw2/attachments/556suppressor.mdl", bone = "weapon", rel = "", pos = Vector(0.076, 5.433, -2.777), angle = Angle(0, 180, 0), size = Vector(0.703, 0.703, 0.703)},
		["md_eotech"] = {model = "models/wystan/attachments/2otech557sight.mdl", bone = "weapon", rel = "", pos = Vector(0.432, 14.439, 13.034), adjustment = {min = 12, max = 14.5, axis = "y", inverseOffsetCalc = false}, angle = Angle(-176.648, -90, 0), size = Vector(1.343, 1.343, 1.343)},
		["md_tigglaser"] = {model = "models/attachments/laser.mdl", bone = "weapon", rel = "", pos = Vector(0.897, -4.146, -1.665), angle = Angle(0, 90, -60.006), size = Vector(0.7, 0.7, 0.7)},
		["md_microt1"] = {model = "models/cw2/attachments/microt1.mdl", bone = "weapon", rel = "", pos = Vector(0.046, 0.486, -2.297), adjustment = {min = -3, max = 0.486, axis = "y", inverseOffsetCalc = false}, angle = Angle(180, 0, -1.17), size = Vector(0.446, 0.446, 0.446)},
		["md_schmidt_shortdot"] = {model = "models/cw2/attachments/schmidt.mdl", bone = "weapon", rel = "", pos = Vector(-0.245, 5.631, 3.177), adjustment = {min = 3, max = 5.631, axis = "y", inverseOffsetCalc = false}, angle = Angle(180, -90, 0), size = Vector(0.935, 0.935, 0.935), color = Color(255, 255, 255, 255)},
		["md_acog"] = {model = "models/wystan/attachments/2cog.mdl", bone = "weapon", rel = "", pos = Vector(-0.281, 5.268, 3.094), adjustment = {min = 2, max = 5.268, axis = "y", inverseOffsetCalc = false}, angle = Angle(0, 0, 180), size = Vector(0.919, 0.919, 0.919)}
	
	}

“md_default” is the model i want active and stuff

If you have any idea whats the function of when you change attachments, please tell me!
thank you