Hythe sight is complete with screws and "Z" spring and is in excellent condition. These rear sights are very hard to find.
ARMS #40 must be newer model in excellent condition. Will also consider other flip up BUIS such as a GGG A2 flipup newer model with locking detent. Let me know what you have to offer, but preference will go to a ARMS #40.
Please email with any questions.