BSA Dioptre Sight

BSA’s Dioptre Sight Set comes neatly packed in its own padded box. Inside, we get the main dioptre rear sight block, the rubber eye piece, the foresight assembly, and a small bag of foresight elements. The foresight is a plastic moulding, but still has a precise feel about it. The base is a small dovetail clamp, so is designed to fit onto a dovetail rail. Once in place, the central element can be changed for a slightly different specification, which can subtly alter the image as the shooter views the target. To change the element, one of the knurled collars simply unscrews slightly to allow the new element to be dropped into its slot within the housing. The rear sight is an all-metal construction. This just clamps onto the rear dovetail/ scope rail of the rifle, and is easily adjusted by hand, courtesy of the one large knurled bolt on the clamp. Set in the correct position with regards to eye relief, so that the eye just gently nudges the rubber cup, and this will then help cut out back light and promote a sharper picture. The rear sight is fully adjustable for both windage and elevation, and both the adjustments are shown on mini scales across the unit.

Conclusion

Having used several dioptres over the years, I can certainly vouch for the quality of this unit when compared to some more basic efforts, and it seems reasonable value for money, given everything you need is here.