Holosun 507K X2 – Compact Red Dot for Slim Pistols

The Holosun 507K X2 is a micro red dot sight built for today's most popular concealed carry pistols—including the Sig Sauer P365, Glock 43X MOS, and Springfield Hellcat. It combines rugged durability, precise reticle clarity, and intuitive brightness controls in a slim, optics-ready footprint.

This red dot uses the RMS mounting footprint, making it a direct fit for slides cut for Shield RMSc-style optics. No adapter plates, no guesswork—just mount and go. With up to 50,000 hours of battery life, Shake Awake motion activation, and a crisp 2 MOA dot with circle reticle, the 507K X2 delivers fast target acquisition without compromising your pistol's slim profile.

Whether you're upgrading your EDC or building out a red dot-equipped subcompact, the 507K is a trusted favorite among professionals and everyday carriers alike.

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🔧 Key Features:

• Compact red dot designed for slim, single-stack pistols
• Fits RMS/RMSc optic cuts – no adapter required on most slides
• Crisp 2 MOA dot with 32 MOA circle reticle (multi-reticle system)
• Durable 7075-T6 aluminum housing with black hardcoat anodize
• Shake Awake technology powers up on motion, powers down when idle
• Side battery tray – no need to remove optic for battery changes
• Up to 50,000 hours of battery life on medium settings
• Manual brightness controls and lockout mode
• Compatible with Sig P365, Glock 43X MOS, Springfield Hellcat, and more

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🔍 Compatible Pistols:

• Sig Sauer P365, P365X, P365XL (with RMS-cut slides)
• Glock 43X MOS, Glock 48 MOS (no adapter needed)
• Springfield Hellcat OSP
• Shadow Systems CR920
apriate mounting plate)

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Looking to get the most from your Holosun 507K setup? Pair it with RMSc footprint optics and explore our selection of optic-ready Sig P365 slides and Glock 43X-compatible slides for a perfect fit.

Need help with installation? We carry red dot mounting plates, suppressor-height sights for co-witnessing, and the right gunsmithing tools to make your install easy. Once mounted, carry with confidence using holsters designed for red dot-equipped P365 pistols.

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❓ Frequently Asked Questions (FAQ)

Q: Will the Holosun 507K fit my Sig Sauer P365 without an adapter?
A: Yes—if your slide is cut for the RMSc footprint, like most factory P365XL and aftermarket slides. No adapter is needed for direct fitment.

Q: Does the 507K X2 work with the Glock 43X MOS?
A: Yes. The 507K X2 fits directly on the Glock 43X MOS and Glock 48 MOS without the need for an adapter plate.

Q: What’s the difference between the 507K and 407K?
A: The 507K offers a multi-reticle system (2 MOA dot + 32 MOA circle), while the 407K has a single 6 MOA dot. The 507K provides more versatility in targeting.

Q: Can I use this red dot on my Springfield Hellcat?
A: Yes, the Holosun 507K is compatible with the Hellcat OSP model without modification.

Q: Does the 507K come in green dot as well?
A: Yes. The 507K X2 is available in both red and green reticle versions—choose the one that best suits your vision and lighting conditions.