SWAT Optics Verified Updated: 4,900+ Tested Combinations 110+ Optics 262+ Handguns

What Handguns Fit the Holosun HE509 ACSS Vulcan (MOS)?

45 compatible handguns verified • 14 direct fit • 31 with adapter plate

📋 Quick Answer

The Holosun HE509 ACSS Vulcan (MOS) fits 45 handguns. 14 pistols accept direct mounting with the Glock MOS footprint—no adapter needed, including the Glock 17 MOS, Glock 19 MOS, Glock 19X MOS. 31 additional handguns are compatible using adapter plates that convert other slide cuts to the Glock MOS pattern. This compatibility data is SWAT Optics Verified.

Does the Holosun HE509 ACSS Vulcan (MOS) fit my handgun?

The Holosun HE509 ACSS Vulcan (MOS) uses the Glock MOS footprint mounting pattern. If your handgun has a Glock MOS-cut slide, the Holosun HE509 ACSS Vulcan (MOS) mounts directly without adapters. SWAT Optics has verified 14 handguns with direct Glock MOS compatibility. For handguns with different slide cuts (like Glock MOS, Sig RX, or Springfield OSP), you'll need an adapter plate—31 handguns work this way. Check the lists below to find your specific handgun model.

Holosun HE509 ACSS Vulcan (MOS) pistol red dot sight

Holosun HE509 ACSS Vulcan (MOS)

Footprint: Glock MOS Emitter: enclosed MSRP: $509.99 Compatible: 45 handguns
45
Total Compatible
14
Direct Fit
31
With Adapter
14
Recommended

Which Handguns Accept the Holosun HE509 ACSS Vulcan (MOS) Directly?

14

These 14 handguns have Glock MOS-cut slides that accept the Holosun HE509 ACSS Vulcan (MOS) without any adapter plate. The optic mounts directly to the slide using the included hardware. Direct mounting provides the lowest possible sight height and most secure fit.

Glock 17 MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Glock 19 MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Glock 19X MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Glock 20 MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Glock 21 MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Glock 22 MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Glock 23 MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Glock 34 MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Glock 35 MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Glock 40 MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Glock 41 MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Glock 45 MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Glock 47 MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Glock 49 MOS ★ Recommended

Slide Cut: Glock MOS
Direct fit with included MOS plate - enclosed emitter ACSS Vulcan

Which Handguns Need an Adapter Plate for the Holosun HE509 ACSS Vulcan (MOS)?

31

These 31 handguns require an adapter plate to mount the Holosun HE509 ACSS Vulcan (MOS). The adapter converts the handgun's native slide cut to the Glock MOS footprint pattern. Adapter plates are available from various manufacturers and typically cost $20-50.

Showing 20 of 31 adapter-compatible handguns. Search the full database for more options.

Frequently Asked Questions About Holosun HE509 ACSS Vulcan (MOS) Compatibility

What handguns fit the Holosun HE509 ACSS Vulcan (MOS)?

The Holosun HE509 ACSS Vulcan (MOS) fits 45 handguns total. 14 pistols accept direct mounting without adapters, while 31 additional handguns are compatible using adapter plates. Popular direct-fit options include Glock 17 MOS, Glock 19 MOS, Glock 19X MOS, Glock 20 MOS, Glock 21 MOS, Glock 22 MOS, Glock 23 MOS, Glock 34 MOS, Gloc....

Does the Holosun HE509 ACSS Vulcan (MOS) require an adapter plate?

It depends on your handgun's slide cut. If your pistol has a Glock MOS-cut slide, the Holosun HE509 ACSS Vulcan (MOS) mounts directly—no adapter needed. Handguns with other slide cuts (like Glock MOS, Sig RX, or Springfield OSP) require an adapter plate to convert to the Glock MOS pattern.

What mounting footprint does the Holosun HE509 ACSS Vulcan (MOS) use?

The Holosun HE509 ACSS Vulcan (MOS) uses the Glock MOS mounting footprint. This is a standardized hole pattern that determines which slides the optic can mount to directly. Other popular footprints include Trijicon RMR, Shield RMSc, and Aimpoint ACRO.

What fits the Holosun HE509 ACSS Vulcan (MOS)?

The Holosun HE509 ACSS Vulcan (MOS) fits 45 handguns total. 14 accept it with direct fit (no adapter needed), and 31 require an adapter plate. Popular options include Glock 17 MOS, Glock 19 MOS, Glock 19X MOS, Glock 20 MOS, Glock 21 MOS.

What footprint is the Holosun HE509 ACSS Vulcan (MOS)?

The Holosun HE509 ACSS Vulcan (MOS) uses the Glock MOS footprint mounting pattern.

Which handguns can mount the Holosun HE509 ACSS Vulcan (MOS) without an adapter?

14 handguns accept the Holosun HE509 ACSS Vulcan (MOS) with direct fit: Glock 17 MOS, Glock 19 MOS, Glock 19X MOS, Glock 20 MOS, Glock 21 MOS, and 9 more.

Is the Holosun HE509 ACSS Vulcan (MOS) good for concealed carry?

Yes, the Holosun HE509 ACSS Vulcan (MOS) has an enclosed emitter which protects the lens from debris, making it ideal for concealed carry.

How is this compatibility data verified?

SWAT Optics verifies all compatibility through physical testing. Our database contains 262+ handguns, 110+ optics, and 4,900+ verified records.

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