unfortunately 75 + 75 = 150 (#26260)

code/modules/surgery/organs/organ_external.dm

@@ -62,6 +62,8 @@
 	var/can_stand
 
 	var/splinted_count = 0 //Time when this organ was last splinted
+	///If this organ's max HP is reduced by the IPC magnetic joints implant
+	var/fragile = FALSE
 
 /obj/item/organ/external/necrotize(update_sprite=TRUE, ignore_vital_death = FALSE)
 	if(status & (ORGAN_ROBOT|ORGAN_DEAD))
@@ -222,7 +224,7 @@
 
 /obj/item/organ/external/receive_damage(brute, burn, sharp, used_weapon = null, list/forbidden_limbs = list(), ignore_resists = FALSE, updating_health = TRUE)
 	var/max_limb_damage = max_damage
-	if(owner)
+	if(owner && fragile)
 		max_limb_damage -= (HAS_TRAIT(owner, TRAIT_IPC_JOINTS_MAG) ? max_damage * 0.25 : 0)
 	if(tough && !ignore_resists)
 		brute = max(0, brute - 5)

code/modules/surgery/organs/subtypes/standard_organs.dm

@@ -53,6 +53,7 @@
 	amputation_point = "left shoulder"
 	can_grasp = 1
 	convertable_children = list(/obj/item/organ/external/hand)
+	fragile = TRUE
 
 /obj/item/organ/external/arm/emp_act(severity)
 	..()
@@ -85,6 +86,7 @@
 	amputation_point = "left hip"
 	can_stand = 1
 	convertable_children = list(/obj/item/organ/external/foot)
+	fragile = TRUE
 
 /obj/item/organ/external/leg/emp_act(severity)
 	..()
@@ -123,6 +125,7 @@
 	parent_organ = "l_leg"
 	amputation_point = "left ankle"
 	can_stand = 1
+	fragile = TRUE
 
 /obj/item/organ/external/foot/emp_act(severity)
 	..()
@@ -164,6 +167,7 @@
 	parent_organ = "l_arm"
 	amputation_point = "left wrist"
 	can_grasp = 1
+	fragile = TRUE
 
 /obj/item/organ/external/hand/emp_act(severity)
 	..()
@@ -229,6 +233,7 @@
 	amputation_point = "neck"
 	gendered_icon = TRUE
 	encased = "skull"
+	fragile = TRUE
 	var/can_intake_reagents = 1
 	var/alt_head = "None"