Rapid fire rifles are not new.
The old Henry LEVER ACTION Repeating Rifle of 1860 was advertised to shoot SIXTY SHOTS A MINUTE!
Neal Knox, back in the late 1980s found the first planned California AW rifle ban also included lever action rifles.
https://www.pinterest.com/pin/682013937292868666/
And the Evans lever action rifle held 26 shots and was advertised at 26 rounds a minute!
Actually better than a lever action was the WW1 Winchester Model 1897 pump shotgun with extended tube magazine and bayonet. If you hold the trigger down and just keep pumping it will slam fire multiple shots with no shoulder/stock bump or trigger movement.
The following is an article on this really old fashions slam fire repeating shotgun. https://www.warhistoryonline.com/guns/trench-broom-famous-model-1897-shotgun.html