@3dRaven here’s the video and I tried both using new Actor. Unfortunately, it didn’t worked
Set
f
I noticed the compile button has an exclamation mark noting that the script has not been updated
(inside of the actor weapon select bp)
Try compiling it, only then will the changes to the blueprints work correctly. (otherwise unreal uses the previous cached nodes)
You could try checking if you have the latest hotfixes on your engine version. Maybe some minor bug is causing this inconstancy.
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I compiled it again and again and it still not working. I need to take lunch break and I will be back. Need to forget this and come back fresh. Thank you again for your time and looking into this. I really appreciate it. Thank you @ClockworkOcean @3dRaven for all you do to help new learner like me. If you think of anything please tag me in this post.
Here’s how I fell about this issue today 
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swap.zip (347.3 KB)
Made a minimal scene in 5.5. Take a look if it swaps correctly for you.
I just opened your project and it didn’t work for me. Here’s the video, my head is spinning and I need to take a break. I will be back and thank you so much for this. Something wrong with my PC or Unreal then ???
Are you sure the Construction Script is actually running?
One way to test is to add a Print String in the Construction Script and check to see if it prints in the Output Log when changing the Variable.
I would in that case suggest verifying your engine files and maybe try reverting to unreal’s default settings. It should work.
After struggling for almost 2 days, it was finally fixed. Huge Thanks to @ClockworkOcean. You are truly a hero. The solution was simple. Updated my engine from 5.5.1 to 5.5.4, and it’s working. It kinda feels crazy to me cuz I always assumed that updating the engine in the middle of a project wasn’t good. I don’t know how my mentor managed to get the same result in the older version.
Also, I would like to know if updating the engine in the middle of the project is good or not, especially if I am planning to release the game to the world, but this project I am working on is for my final exam submission and not to the world and if it was to the world who is paying x amount of money, can anyone tell me what would be the best scenario ?? Update the engine or not and how would you deal with it ???
Thank you again @ClockworkOcean for fixing this and @3dRaven for always doing your best to help me. Here’s the video, and I am showing off some of my weapon skills too
Oh, by the way, both SET and f work now 
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Fab 
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