The profile of the receiver is somewhat funky and not true to the original.
I emailed them asking about the twist rate, land and groove diameter and if the receiver is truly brass or plated, and never received a response.
Just sent them another one, and maybe they'll decide to email back this time.
I've never liked any of their zamak alloy Erma-werk knockoffs, but I'll give them a chance if this thing is real- it just doesn't look quite right though.