But it was much better than the US Bazooka.
Used in Korea against WWII-era Russia-built tanks, the small-diameter US Bazooka proved near-useless against most areas of Russian armor. It did work against the lighter German armor (trucks of course, armored cars), buildings and light bunkers, but not against heavy tanks. But it was all the US forces had.
That, and lots of Sherman targets.
The Americans had to wait to get upgraded to the 3.5” bazookas. The short-sightedness of the military was exposed when troops were equipped with old weapons because Korea wasn’t Europe.