Does anyone know where you can get the little clip on night sight for a RPK rear sight? Do they only come painted or can you get one that has tritium inserts? I would prefer the tritium kind if I can change out the vials. Anyway thanks in advance.
Assuming your are speaking of the Soviet and Romainian pattern RPK rifles, the ones I've seen used some form of luminous paint. I suspect most of the RPK night sights available in the US are from the former East Germany.
RobertRTG used to carry them, as did Northridge.
Numrich gun parts may have had them as well.
Best bet will be gunbroker or ebay.
Yugoslavia issued there RPK rifles with glow paint and then later tritirum night sights. Rguns - last I knew - still had new tritium Yugo RPK sights.