Nice sight but be careful if using on a buckmark. - Truglo Rimfire Pistol Fiber Optic Front Sight

The positive points of this sight are: it is very bright and easy to install. If you are installing on a Buckmark to replace the standard black front sight, be careful. Buckmark black front sights come in two different heights depending on the model. The Buckmark Camper model has a taller front sight than the URX model. The Camper sight is approximately .445” tall, and matches up well to this Truglo sight which is also .445”. However the URX model has a lower blade height which is approximately .380” tall. A better choice for the URX would be a Dawson Precision fiber optic which comes in a variety of heights: .365”, .375” and .420”.
The Truglo sight will work on the URX but you will use up a lot of your rear target sight adjustment.
This information is based on the Buckmarks I own.