What is the best red dot to put on a P320 X5 Legion???? Co-witness?? Thanks

I can tell you I have Romeo1 Pro, 6MOA, on my X5's that I shoot CO, and SC with. So far they have been just fine. I did have an issue with a first gen Romeo1, but Sig fixed that under warranty. These sights have a rear "notch" that you can co witness with, but it has been my experience that this is a bit off. I guess you could drift the front sight to dial this in, as the optic can not be adjusted.

I use Shield red dot sights. Brownells
carry them The RMS is for double stack
pistols while the RMSc is for single stack.
Can use your original iron sights with them
They'er on all the tims (Batts last two or more years years. The dot adjusts automatically
to the atmosphere. No adjustment other than
elevation and left or right.

Poli Viejo

I too have a Romeo 1 Pro on my X5 Legion. The rear to the optic has two sight dots that co-witness with a channel built into the optic and the front sight. My son liked the setup well enough that he too is using the Romeo 1 Pro on his as well. The one thing to note is that the battery cover has a tendency to come loose if not correctly torqued down. Torquing the cover to 10 inch pounds eliminates the problem.