>>8769982short version of it is that all army items have a designation...
L1a1 was the imperial pattern FN-FAL.
L2A1 was the Trilux scope for the FAL.
L85a1 is the SA80 rifle,
L96a1 is the Accuracy international AW in .308,
L115a1 is the AI in .338 lap mag.
L9a1 is/was the Browning Hi-power
L108a1 and L110a1 are the standard and paratrooper folding stock FN-Minimi LSW - which is of course, called the M249 SAW in the US.
and so it goes on for every weapon, comms gear, etc.