Holosun 507c size comparison. 320p c compact - Holosun HS507C-X2 1x 2 MOA Dot Reflex Red Dot Sight

i ordered the 507c instead of the 507k. Because I believed at that time they were the same size, and the 507c just had a few extra reticle options over the 507k. So I ordered the 507c. Later to find out that was not true and the 507k was a smaller optic. Which at the time I was looking for the 507k smaller foot print to mount on a p320 x compact. After I the 507c came in the mail I was planning on returning it thinking it was going to be a big wind sail on my pistol. I gave it a try and mounted it on my p320 x compact. But I was wrong! it’s perfect looks like it came OEM on my gun. + the extra sight picture, and reticle options over the 507k. Pulse it’s not big on my pistol it’s looks like it came OEM on the gun. I decided to keep it and I’m very happy with the size of it.