Mine‘s a basic model carried for two years. I bought a X slide from Sig with a Romeo Zero on it & would swap slides as I tried out shooting with a red dot & then switching back. Never carried with the red dot as I never got 100% comfortable with it doing draw fire drills-close to my iron site times but almost always there was a hesitation as I picked up the dot. Recently mounted a Holosun 507k green on it & I‘m doing a lot better picking up the 32 MOA circle with dot & continue to train.
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