CWS on L42A1

[Alan de Enfield]

What was the L5A1 sight used on other than the M16? Looks more compact than the IWS sight?

Well, according to the company selling them :

BRITISH ISSUE L5A1 NIGHT SIGHT WITH L1A1 MOUNT military spec in good working order showing some signs of use to body, comes complete with reproduction mount to fit the British L1a1 rifle and nylon carry bag (not pictured) these sight use the standard camera battery so no need to search for funny sized batteries, can be used during daylight as they are fitted with daylight filters. Priced £1495