I have not sent in for the $30 .22 WMR cylinder for my wife's Heritage Rough Rider, but I think I should. My shooting buddy sent in the payment with his serial number and got one for his revolver - it was a literal 'drop-in' fit. The .22 Magnum shoots very nicely out of his 6 1/2" barrel. I believe that the factory states that 'some' revolvers may need to be sent back to the factory for proper fitting of the magnum cylinder.
Maybe this thread will inspire me to order one. On several occasions there was no .22 LR on the shelves locally, while .22 WMR was available. That ammo is a tad pricey, but the HRR .22 Revolver handles it well.
The quality is clearly not that of a Colt, S&W, or Ruger, but the Heritage Arms .22 has a high 'fun per dollar spent' ratio. The best handgun I ever purchased for $150 would come down to the Heritage Rough Rider .22 LR or a C&R eligible CZ50 in .32 ACP.