Correct Enfield pattern rifling available today...

[GeeRam]

Armalon and Lother-Walther are the only two options if you want to re-barrel a SMLE or No.4 Lee-Enfield anyway now it seems...and I would guess Armalon are the only option in town if you need to re-barrel a L42 or Enforcer....?

Criterion have stopped making their No.4 barrels by all accounts for some reason, and Lother-Walther for some reason don't export their SMLE barrels to USA, so there's certainly issues now if you are North America based and need a new barrel for a No.3/No.4.