ok

code/game/objects/structures/beds_chairs/chair.dm

@@ -317,7 +317,7 @@
 	throwforce = 10
 	throw_range = 3
 	hitsound = 'sound/items/trayhit1.ogg'
-	hit_reaction_chance = 50
+	block_chance = 50
 	custom_materials = list(/datum/material/iron = 2000)
 	var/break_chance = 5 //Likely hood of smashing the chair.
 	var/obj/structure/chair/origin_type = /obj/structure/chair

code/modules/antagonists/abductor/equipment/abduction_gear.dm

@@ -92,10 +92,8 @@
 		M.cut_overlays()
 		M.regenerate_icons()
 
-/obj/item/clothing/suit/armor/abductor/vest/hit_reaction(mob/living/carbon/human/owner, atom/movable/hitby, attack_text = "the attack", final_block_chance = 0, damage = 0, attack_type = MELEE_ATTACK)
-	DeactivateStealth()
-
-/obj/item/clothing/suit/armor/abductor/vest/IsReflect()
+/obj/item/clothing/suit/armor/abductor/vest/run_block(mob/living/owner, real_attack, atom/object, damage, attack_text, attack_type, armour_penetration, mob/attacker, def_zone, final_block_chance, list/block_return)
+	. = ..()
 	DeactivateStealth()
 
 /obj/item/clothing/suit/armor/abductor/vest/ui_action_click()

code/modules/antagonists/cult/cult_items.dm

@@ -169,17 +169,17 @@
 	else
 		..()
 
-/obj/item/twohanded/required/cult_bastard/hit_reaction(mob/living/carbon/human/owner, atom/movable/hitby, attack_text = "the attack", final_block_chance = 0, damage = 0, attack_type = MELEE_ATTACK)
+/obj/item/twohanded/required/cult_bastard/run_block(mob/living/owner, real_attack, atom/object, damage, attack_text, attack_type, armour_penetration, mob/attacker, def_zone, final_block_chance, list/block_return)
 	if(prob(final_block_chance))
-		if(attack_type == PROJECTILE_ATTACK)
+		if(attack_type == ATTACK_TYPE_PROJECTILE)
 			owner.visible_message("<span class='danger'>[owner] deflects [attack_text] with [src]!</span>")
 			playsound(src, pick('sound/weapons/effects/ric1.ogg', 'sound/weapons/effects/ric2.ogg', 'sound/weapons/effects/ric3.ogg', 'sound/weapons/effects/ric4.ogg', 'sound/weapons/effects/ric5.ogg'), 100, 1)
-			return TRUE
+			return BLOCK_SUCCESS | BLOCK_PHYSICAL_EXTERNAL | BLOCK_REDIRECT | BLOCK_SHOULD_REDIRECT
 		else
 			playsound(src, 'sound/weapons/parry.ogg', 75, 1)
 			owner.visible_message("<span class='danger'>[owner] parries [attack_text] with [src]!</span>")
-			return TRUE
-	return FALSE
+			return BLOCK_SUCCESS | BLOCK_PHYSICAL_EXTERNAL
+	return BLOCK_NONE
 
 /obj/item/twohanded/required/cult_bastard/afterattack(atom/target, mob/user, proximity, click_parameters)
 	. = ..()

code/modules/clothing/suits/reactive_armour.dm

@@ -4,6 +4,7 @@
 	icon_state = "reactiveoff"
 	icon = 'icons/obj/clothing/suits.dmi'
 	w_class = WEIGHT_CLASS_BULKY
+	var/hit_reaction_chance = 50
 
 /obj/item/reactive_armour_shell/attackby(obj/item/I, mob/user, params)
 	..()

code/modules/mob/living/living_block.dm

@@ -81,32 +81,3 @@
 		owner.visible_message("<span class='danger'>[owner] blocks [attack_text] with [src]!</span>")
 		return 1
 	return 0
-
-/obj/item/proc/_IsReflect(var/def_zone) //This proc determines if and at what% an object will reflect energy projectiles if it's in l_hand,r_hand or wear_suit
-	return 0
-
-
-
-/mob/living/carbon/human/check_reflect(def_zone)
-	if(wear_suit?.IsReflect(def_zone))
-		return TRUE
-	return ..()
-
-/mob/living/carbon/human/check_shields(atom/AM, damage, attack_text = "the attack", attack_type = MELEE_ATTACK, armour_penetration = 0)
-	. = ..()
-	if(.)
-		return
-	var/block_chance_modifier = round(damage / -3)
-	if(wear_suit)
-		var/final_block_chance = wear_suit.block_chance - (CLAMP((armour_penetration-wear_suit.armour_penetration)/2,0,100)) + block_chance_modifier
-		if(wear_suit.hit_reaction(src, AM, attack_text, final_block_chance, damage, attack_type))
-			return TRUE
-	if(w_uniform)
-		var/final_block_chance = w_uniform.block_chance - (CLAMP((armour_penetration-w_uniform.armour_penetration)/2,0,100)) + block_chance_modifier
-		if(w_uniform.hit_reaction(src, AM, attack_text, final_block_chance, damage, attack_type))
-			return TRUE
-	if(wear_neck)
-		var/final_block_chance = wear_neck.block_chance - (CLAMP((armour_penetration-wear_neck.armour_penetration)/2,0,100)) + block_chance_modifier
-		if(wear_neck.hit_reaction(src, AM, attack_text, final_block_chance, damage, attack_type))
-			return TRUE
-	return FALSE

code/modules/mob/living/simple_animal/hostile/mining_mobs/elites/herald.dm

@@ -251,7 +251,7 @@
 	icon = 'icons/obj/lavaland/elite_trophies.dmi'
 	icon_state = "herald_cloak"
 	body_parts_covered = CHEST|GROIN|ARMS
-	hit_reaction_chance = 10
+	var/hit_reaction_chance = 10
 
 /obj/item/clothing/neck/cloak/herald_cloak/proc/reactionshot(mob/living/carbon/owner)
 	var/static/list/directional_shot_angles = list(0, 45, 90, 135, 180, 225, 270, 315)