HS507K vs. HS507C Footprint Differences: Which Optic Fits Your Pistol?

Introduction

One of the most common questions among firearm enthusiasts upgrading to red dot optics is: What is the exact difference between the HS507C and HS507K footprints? Choosing the wrong model can lead to fitting issues, improper screw length, or requiring unnecessary adapter plates.

In this quick compatibility breakdown, we compare the full-size standard versus the subcompact slimline standard, helping you choose the right optic for your slide cut—featuring the XGA HS507K Red Dot Sight ($179.00).

Key Footprint Differences: C-Footprint vs. K-Footprint

While the full-size HS507C footprint is designed for standard duty slides (such as full-size or compact handguns and carbines), the HS507K footprint is specifically engineered for single-stack and micro-compact slides.

Standard Shield RMSc cuts feature four corner recoil lugs. The K-series modifies this design by removing the rear recoil lugs and reducing overall housing width to match slim slides perfectly.

Uncompromised Zero Hold for Subcompacts

Because slimline slides move faster during cycling, subcompact optics experience higher violent g-force shock. The XGA HS507K is specifically reinforced to handle severe shock.

During rigorous durability tests—including repeatedly striking wood blocks with the optic body—the XGA HS507K maintains its structural zero without losing illumination or point of impact.

“Understanding footprint compatibility prevents costly fitment errors, while the XGA HS507K ensures your subcompact slide gets battle-tested shock resistance for only $179.00.”

Find the Perfect Slimline Fit for $179.00

Avoid fitment errors and get battle-tested clarity for your subcompact slide.

[Order the XGA HS507K Subcompact Red Dot Sight directly on XGA Shop for $179.00]