Fixes monkeys trying to take offhands

code/modules/mob/living/carbon/monkey/combat.dm

@@ -272,7 +272,11 @@
 				if(Adjacent(target) && isturf(target.loc))	// if right next to perp
 
 					// check if target has a weapon
-					var/obj/item/weapon/W = locate(/obj/item/weapon) in target.held_items
+					var/obj/item/weapon/W
+					for(var/obj/item/weapon/I in target.held_items)
+						if(!(I.flags & ABSTRACT))
+							W = I
+							break
 
 					// if the target has a weapon, chance to disarm them
 					if(W && prob(MONKEY_ATTACK_DISARM_PROB))