I never expected people to like it .
First of all I search for reference pics (for this one I used a blueprint I got on Google)
Then I made 2 tubes: 1 thick and 1 thin.
For the thick tube I meassured everything (diameter and length) and filled it with rolled paper. After that I glued all the buttons and grips.
Next I put the thin tube inside the thick tube and painted it. (It's hard for me to explain it because English is not my first language but for my next replica I'll show more pics so you can see the entire process)