Hello, I own a fine Buck Mark 22LR STANDARD Slab Barrel Pistol with 5-1/2" BULL Model 05140****. I purchased it new. SN# is 515MV09826. I am looking for Fiber Optic Sights Front for sure and maybe Rear. No supplier seems to have detail enough spec so I can be assured they will fit or they will say "does not fit .9" Barrel or does not fit 5-1/2" Standard etc. I'm at a loss after contacting all the main suppliers and not getting any assurance. The Diameter of the Barrel is .900" and the height of the Front Sight from Barrel to top of Blade is .385". I also want a Steel or Aluminum Sight Body - NOT Plastic. So you have such an option or can you steer me to a supplier? Thanks, 216-906-**** Gordon