The Sig Romeo Zero has been back on shelves for a month plus now. (Wish the Sentinel was). The going price is 199 for the Sig RZ. "IF" you are not in a huge hurry to buy and can stand to wait awhile, (30+ daze, I mean days), I would look at the SwampFox or Shield RMSc. The polymer frame and lens on the Sig RZ just doesn't give me warm fuzzy feelings on my Hellcat. It works well for me and holds zero plus it easily co-witnesses the sights but it won't hold up to a direct drop on a hard surface and I already had to replace the factory battery after about 6 weeks of carrying. And this isn't always on. Its a shake and awake and that feature works each and every time so that really sucks! I'm waiting to see how long a fresh Energizer 1632 holds up in it.