Hi Buckstix,
Here are the pictures.

Back sight:


Front sight:


Frankly, neither of them look original. The front sight is quite tall...At least 5 or 6 mm.

The center to center distance is ~22mm at the breech and ~18mm at the muzzle. Barrel length is 71cm, i.e 28".

Hope this helps.

BTW, As soon as I saw the pictures of your gun on George's site, I called about it. However, I was not sure that I needed two of them!

Best regards,
WC-