I've probably asked this one before, but I have forgotten the answer.

Why did BSA not go ahead with the RB1 roller-breech?

The taps on the Lincoln Jefferies design needed hand-fitting and look a right old faff to turn up.

The roller-breech would surely have been an easier, faster design to make? As well as being more efficient as a direct-load system.

In general I cannot see why the sliding breech system was not adopted sooner and instead of the rubbishy old tap system.

I mean if the Chinese Communist industry of the 1970s could make the sliding-breech Lion after a quick look at the Anschutz, realising this was a cheap and easy way of making a fixed barrel rifle for low cost, then why the blazes did no one in Germany, Britain or Czechslovakia realise the same thing 50 years earlier?

WHY WHY WHY????