Wavell's 30,000 also ended up as a major user of any MAB 38 SMGs captured from the ItaliansI think a lot of the logistical and support stuff - trucks and such - were used up by 8th Army
A lot of 9mm rounds went to supplying sten gun mags, iirc. There were also 20mm guns that 'just happened' to end up fitted to RN ships.
Italian small arms during this period left a lot to be desired
However their principle SMG was a first class weapon - one of the best of the war