Donnyfl ronin, bought it used and was told it was a .30 cal, 1/2x20 unf threads, had it on my raptor 30 cal and worked fine, just going a different route with what moderators I am using now, has some marks on the back as you can see in the picture, reflecting low price.
$115 firm, shipped to your door, PayPal f&f
$115 firm, shipped to your door, PayPal f&f