I have to say the RedDot looks great with the tritium front sight. I did need to modify one of my holsters, but the dremel works wonders on Kydex. It looks great on the P365XL, not too large. It appears to co-witness well with the Sig front sight. I have not dialed it in, but it does include the correct Allen key, an adjustment gauge, a shim to help with elevation adjustment, and decent instructions. It is a straight forward install, but details like how much to torque the screws are not included. The instructions are not very detailed that come with the sight. I will either get some very small washers or different screws in the near future. They are allen cap-head and take a 2.5mm or a 7/64” allen key. The head diameter is a bit smaller than the screws that come with the sight. I have read online to use 12mm, but the 10mm seem to work fine. In the photo below, the M4 acrews are on top and the M3 screws are on the bottom. As such, the screws that come with the SMSc are M4-0.7 in size which are what the Hellcat needs. The P365XL needs M3-0.5 sized screws that are 10mm in length. The Shield SMSc is marketed towards the Springfield Hellcat. The sight fits perfectly on top of the slide. Once the optic plate is removed, install the battery into the bottom of the sight with the target sticker to the outside.

They are fairly tight, and the socket for the Allen key is fairly shallow so make sure the key is in there straight.

The screws are allen head and use a 3/32” Allen wrench. Initially you need to remove the slide (check the weapon is unloaded) to get to the two small screws on the underside that attach the rear sight and optic cover plate. About $80 more than the Romeo Zero and only $6 more than the Holosun, shipped. Same price as Springfield Armory, but no tax and free shipping. To satisfy my impatience, I got a new Shield SMSc off eBay. So I got tired of waiting on Sig to ship the Romeo Zero to OpticsPlanet and the Holosun HS507K is still not released.

P365 xl romeo zero install