If you have the print size for it, this works great. It fits snugly inside the scope and then widens out at the end so that you can use the stock dust cover, just in case you want to leave the shield on (like me). It's standard length (1-1/2x diameter). I finished it by lightly hand sanding the inside with 220 grit sandpaper to eliminate any gloss.

Print as is. NO SUPPORTS. 15% infill.