Originally Posted by
ExAscoteer2
I am unaware of there ever being a .22” conversion of the L1A1 SLR – indeed for that to work you would have to re-barrel the rifle which wouldn’t make any economic sense!
They used a sleeve insert to the original barrel IIRC.
A firm in the USA remanufactured a run of the .22 conversion kits for the SLR a few years ago, was a rumour early in 2019 that they were going to do another run of them, but not seen whether that happened or not. There's at least one of their kits working very well in a UK straight-pull spec SLR that I know of.