Other than the fact that the single shot L98A1 was virtually impossible for a small cadet to cock successfully without repeated stoppages?
Actually the L41 subcalibre adaptor works well, and a fully modified .22 semi-auto would achieve a lot (the L41 is a user fitted kit so it’s still a S5 firearm). But not the sound, smell or recoil of the real thing, of course.
(PS we’ve had the semi auto L98A2 for about five or six years, keep up!)