It works now.

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

@@ -482,11 +482,9 @@
 
 	user.do_attack_animation(L)
 
-	if(ishuman(L))
-		var/mob/living/carbon/human/H = L
-		if(H.check_shields(src, 0, "[user]'s [name]", MELEE_ATTACK))
-			playsound(L, 'sound/weapons/genhit.ogg', 50, 1)
-			return 0
+	if(L.check_shields(src, 0, "[user]'s [name]", MELEE_ATTACK))
+		playsound(L, 'sound/weapons/genhit.ogg', 50, 1)
+		return 0
 
 	switch (mode)
 		if(BATON_STUN)