hopefully

code/modules/projectiles/gun.dm

@@ -524,6 +524,10 @@ As sniper rifles have both and weapon mods can change them as well. ..() deals w
 	if(fire_delay_group && delay_left > 0)
 		LAZYSET(user.fire_delay_next_fire, src, world.time + delay_left)
 
+	for(var/obj/item/attachable/stock/smg/collapsible/brace/current_stock in contents) //SMG armbrace folds to stop it getting stuck on people
+		if(current_stock.stock_activated)
+			current_stock.activate_attachment(src, user, TRUE)
+
 	unwield(user)
 	set_gun_user(null)