You aren’t kidding, this rabbit hole never ends! One person says to look for FOM while another hyped up SNR. Then there’s the debate on Elbit, Photonis, & L3. White vs. green; thin film vs non film; single vs dual vs single with thermal! Yeah, it’s deep!
I will definitely start searching...
If you go with an electric model, check with your electric company first. They tend to break transformers and the power company can charge you to replace it.
SBE Precision finally has their gas pistons in stock. This is one of the parts Mossberg changed on the new 940. Enjoy!
https://sbeprecision.com/product/stainless-steel-competition-piston-for-mossberg-930-ring-not-included/