Thank you all very much for your responses, I got if figured out. I simply skipped the first two steps in Armscors instructions (Below) and was able to remove it with no problem. I had searched the internet pretty extensively including YouTube where I saw several people remove the slide exactly as described in the instructions but when I would try it wouldn’t slide off. BBBBill had nailed it. Things like this demonstrate how valuable experience is. Thanks again gentlemen, Joe.
1. Moving the slide back, align disassembly notch with back of
slide stop. Remove slide stop.
2. Remove complete upper assembly from frame.
3. Press the guide rod forward, until the small hole on the rod is
exposed on the front of the gun. Using a small Allen wrench or
paper clip with L-shaped bend to keep the spring depressed,
you are allowed to remove the rod, spring, and reverse plug.
Push the recoil spring assembly containing the guide rod, spring,
and reverse plug towards the back of the slide to remove.
4. Remove the firing pin by depressing firing pin and pushing
downward on firing pin stop. Then you can remove the firing pin
and spring.