You're more than welcome to give it a try.
However, just from looking at the elite Alpha Trooper's internals I have a feeling you might have a hard time. Unless you want to remove the slam fire functionality, a Worker or Longshot (similarly sized) tube might not be able to fit without interfering. If you can find a plunger tube that's smaller then I can see it working, but at that point it might not even be worth it.
If I remember correctly, somebody may have fit the Worker tube in a Rampage-which also offers slam fire-at the expense of the side loading magazine. If you're looking for something else similar, somebody on Instagram managed to do the same with the Quick 16.
Best of luck.