I have 3 SUSAT L9A1 Scopes that I have put new tritium in so the pointer now glows green at night. These are in good condition for being from the 80's. They require the 19MM Dovetail mount found on the SA80 series of weapons and the L108/L110 Machine guns. Most SUSAT scopes when you can find them have dead tritium, these are live in show very well in low light. Do not expect a ACOG type bright reticle. The SUSAT's have a pointer that the end glows in low light and is adjustable from full on to off. You can contact me Ralph at "Services@rdts.com or by phone at 480-488-2165 No text