That mechanism, tho
Mechanism of the magazine – Lee-Enfield rifle (SMLE), 1907 Gallaher’s Cigarette card.
The .303 Enfield, of course, was fielded by Britain and her Commonwealth allies throughout both World Wars, Korea and a host of colonial misadventures until they were replaced by variants of the FN FAL in the 1960s. They are still in limited production in India at Ishapore in commercial variants and both 10-round (.303) and 12-round (.308) models remain in use by police and paramilitary units there, although they are slated for replacement.
Not such a bad mechanism, after all.