Hi Alan
, I also have a resin cast from an ASI that i got from sidewinder, your measurements are pretty close to this ,accounting for the normal reduction in casting, so i was wondering if there were two types of ASI 4x20. In particular mine is slightly longer die to the rear lens housing and the plastic covers that go over the addjustment screws are slightly different to as are the scope rings ,which i was hoping to modify to look like the actual ones . Does anyone else have one like this ?
On another note ,big respect to you for all your plans ,its an amazing and extremely helpful contribution you make for all us guys
if you ever need any measurements I would be very happy to help I Have -real sterling L2A3 ,visible V8 engine kit ,hengstler ,M38 scope etc etc !
keep up the good work