Cold Harbour Supply Holosun IRIS-3/LS321 Defender

This is a multi-impact tested, emitter protector for the Holosun IRIS-3 Laser Aiming Device. The CHS Holosun IRIS-3 Defender has been custom designed to fit in the inner flange of the IRIS-3 for fast attachment, security, and ease of install. Additionally, this Defender will also work with Legacy Holosun LS321 series lasers.



Using a similar multi-hit rated, temperature-stable proprietary TPU material as our Thermal Defender line for the housing, the sacrificial lens is also made of the same polycarbonate material as our CHADs and NV Defenders. These defenders will readily absorb multiple impacts from spalling, bbs, and UTM rounds with no issues.

Key Features:

• Precision slip-fit over the emitter of the IRIS-3 with an internal locking flange for fitment
• Multi-hit polycarbonate shield that will protect your laser from any force on force damage as well as dust and debris
• Allows the use of the stock Holosun IRIS-3 cover for laser safety 
• Comes with additional o-rings to secure Defender to IRIS-3; these TPU o-rings are tighter than traditional o-rings for better retention and are far more resistant to oxidation than standard rubber

Install Guide

• Ensure all batteries are out of the laser and the laser is set to OFF
• Remove the stock Holosun rubber cover by peeling the eyelets off retention posts
• Press fit defender on the emitter of the laser. Be sure the posts for the retention elastics and rubber lens cover are in the same orientation as the defender
• (Optional) For extra retention, install the elastic o-rings to the original metal tabs of the laser housing and the tabs of the defender
• Reinstall the stock Holosun lens cover onto the tabs on the defender, NOT on the existing stock metal tabs 

The clear polycarbonate lens protectors have a LIFETIME WARRANTY against breakage. If you somehow shatter your lens, we will provide you a replacement, no questions asked.

Note: Users may notice some reflections on the laser due to the addition of a sacrificial multi-hit lens. However, this will not affect the function of the laser. 

For users of the LS321, the defender will have a mild standoff with the protector but this will not affect laser divergence or usage. 

100% Made in Canada.