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The 407k features a single 6 MOA red dot, perfect for close-quarters shooting and concealed carry. Meanwhile, the 507k brings the heat with its multi-reticle system. You can choose between a precise 2 MOA dot, a wide 32 MOA ring without a dot, or a versatile 32 MOA ring with a 2 MOA dot.
Jason L.
2 years ago
Hi Thomas and welcome. The reticles are the difference. You can view the reticles (bottom) here to make a decision (I favored the HE507K X2) : https://freedomgorilla.com/blogs/news/holosun-pistol-optic-cheat-sheet
James G.
2 years ago