Check the listing for details. Lee Enfield Foresight 045 R.F.I. MkIII Split Base= No.1 MkIII, No.4 Mk1-2, No.5. Condition: Used. Listed at 7.00 USD. Lee Enfield front sight 045 R.F.I. For Royal Factory Ishapore. MkI split base, WWI /WWII. This is NOS sight for the Lee Enfield rifles marked R.F.I. Rifle Factory Ishapore Bengal,India. I have included in the photographs, the chart for the ladder of progression in the indication and height in inches to change your sight, and bring your groups up or down. A shorter site will bring your groups up. They do make special tools that will help in the removal and adjustment of this site. This site will fit No.1 MkIII/* No.3 MkI/ P-14 No.4 Mk 1, 1*, 2, 1/2, 1/3 No.5 MkI M1917 L42A1 Thank you for looking and as always be well and stay safe Take advantage of the free shipping😀😃 please feel free to check out the other items that I have for adoption. Cheers! Si vis pacem, para bellum