As Taff says, they have been around for years. But at least this one is advertised as a replica. A couple of years ago i had a chap bring two into the shop for mounting on his Tikkas that i had sold him a few weeks before. He had got them 'for a song' from evil bay but coild not understand why the Optilock mounts were more expensive than the scopes! A quick comparison with some 'real' scopes soon put him on the right path. He ended up putting them onto his Air Arms and BSA PCP's.....both scopes failed within 3 months! Just goes to show, you do get what you pay for!
Bruce