Arthur was very interested in the automatic rifle developed by Browning, and even personally watched the real-life testing of the BLN-28 Rifle.
To facilitate later stages, this rifle was designed to use the same ammunition as the Lee-Enfield rifle, with a caliber of about 0.303 inches, which is 7.7mm caliber ammunition.
Using this type of ammunition allowed the Lee-Enfield Rifle to have decent lethality, and it could play an unexpected role in trench warfare.
The Lee-Enfield Rifle's practical test limit rate was about 30 rounds per minute, which was nearly the limit for semi-automatic rifles at that time.
It's important to note that the magazine of the Lee-Enfield could only carry ten rounds, meaning that one would have to empty three magazines per minute, which was quite challenging.
This was also why Arthur stated that the firepower of the Lee-Enfield Rifle was already sufficient, as no country could bear the consumption of more weapon ammunition.