The swing outs have built in stops that prevent them from swinging all the way into the body as well as a locking pin for the closed position as a secondary safety, but do not have locking mechanisms for the open position. The heim joints create just enough resistance that they will not unintentionally swing back closed unless you are parked on a very steep incline. The original design did have a locking spring pin for the open position, but we found it unnecessary and it makes for one more step to close the swing outs. We place a lot of importance on making the swing outs as quick and easy to open as possible - we find that when the swing outs are a hassle to operate, the rear door becomes a lot less useable on a day to day basis. If you still prefer to have locking pins for the open position, please send us an email at support@coastaloffroad.com and we can add those to your order for a small additional charge.