This Williams Gun Sight Company manufactured red0 fiber optic front sight is for the Ruger GP100 double action revolver and is in excellent condition overall.  (file photo)

Will Not Fit the following models: GP100 Match Champion, GP100 Standard Models: 1715, 1752, 1753, 1757, 1761 & 1766.

Note: Revolvers with the following serial numbers that we have observed which will accomodate this sight:

GP100 (KGP161): serial #172-45845

Will Not Work On: 177- & 178- Series Revolvers.