Holosun makes the Romeo line for Sig. You pay a premium for the slightly better looks of the Romeo and Sig name, like $200. Get the Holosun HS503GU with Motac, switchable circle dot or dot, and even FDE finish if you like for $150 to 180 on amazon or from natchez shooter supply. I bought three for the price of one Romeo!
Eh. I had a 515GM and I loved it. Someone offered me a decent amount more than I paid for it - so I took it.
I found this 4m for $175 and i’m satisfied with it for the time being. There’s definitely a difference between the other holosuns vs the 515GM and romeo 4m. IPX ratings are higher on the latter models as well.
WTF would any firearm, firearm accessory, or optic company purposefully have manufacturing or assembly operations in CA? It is openly hostile to businesses and even more so to firearms. I’m surprised Surefire continues to be based in CA.
Good deal for you on your Romeo. My Holosun is rated for 30 minutes under a metter of water. I saw a youtube video where some guy put it in a deep bucket of ice water for 25 minutes. He pulled it out and it was just fine and functional. I think that is an IXP 6 rating. Anyway, I can’t hold my breath that long, so it’s good enough for me.
Just make sure the battery caps are always tight! Those CR2032 batteries will short out with only a drop of water as there is only a thin gap that separates that positive and negative sides from each other.
I once went swimming with a garage door opener key chain device and the CR2032 got just a little wet and sizzled right out. Almost exploded, was bulged out and leaking. The opener it self was functional once I dried it out and put in a new battery.
However if I had left the shorted battery in too long, it would have corroded the electronics and ruined the opener. That situation could cost you your red dot sight that otherwise would survive the immersion.
Where are you getting your info that Holuson makes/made these for Sig?
I can tell you from looking at these two red dots side by side that they are NOT the same. I have a slight astigmatism and the dot on the Sigs are sooo much better for me than the Holosun, naked eye and corrected vision. I assume due to better glass and coatings, but one way or the other, SIG > Holosun IMO. I like the circle dot reticle too, I wish more companies were giving that option.