Since this part was not included with FS scopes (unbelievable), its a MUST purchase, how can you survive without 2 accessories? This part is superbly machined and finished and does its job expertly. I scored it a 9/10 because the setscrews dont feel rock solid (like if youre used to AP clamps), I fear theyll end up in the snow one day.
This accessory is essential if you wish to use 2 oculars in your FS- scope. I added it to my FS-128 and am very pleased. Very solid with a quality compression ring. It is black anodized so isnt entirely flat black on the inside, (which is why I clicked the 9 button). It may not matter but it would have been nice. Recommended.