I'll need to update this review once I've installed it on my M1A, but for now it looks like a very reasonable purchase. The product itself is nicely machined and finished and the rails are properly spaced. The rough fitting test I tried seems good, but I haven't actually taken it to the range yet as it's still cold and rainy. I'm just not excited enough to sit in a downpour and go through sight in.
I'll provide the details of the install and range trip once complete.
Pros: Nice finish and Machining
Cons: Hard to tighten Large Knob
This review was written in the old system and had content requirements that are different than reviews written today.