DRS-TH Defender Lens Protector

* Pre-orders open for a Level 1 & 3. ETA Jan 15 *

Developed by ISLE MFG and made in the USA, the DRS-TH Defender Lens Protector is a comprehensive protection solution for the Holosun DRS-TH thermal red dot sight. The DRS-TH Defender not only protects the brittle Germanium lens on the DRS-Th but also includes a multi-hit polycarbonate lens for the red dot window while retaining all of the use of the factory flip-down and rubber bikini covers. The main body of the protector is made from a proprietary blend of semi-rigid thermoplastic polyurethane for multi-hit protection without shattering.

Recognizing that each user's requirements are unique, three different protection levels are available that include the following components:

• Optical-Grade multi-coated Germanium Sacrificial lens optimized for 8-14µm wavelength, is tested to absorb up to a 0.2g BB at 350fps and UTM and Simunitions at point blank range with no penetration. Not multi-impact-rated
• Multi-Impact Rated custom-cut Titanium Honeycomb

Level 1 - Germanium sacrificial lens only. This option provides impact protection with the highest levels of optical performance. Ideal for users who want maximum performance and thermal signal while still protecting the host lens. No perceived signal loss. Not ideal for situations where multi-hit capabilities are required.

Level 2 - Titanium honeycomb only. A custom-cut titanium honeycomb offers multi-hit resistance and has been tested for 400fps with 0.2g BBs at point blank range. The mesh density is specially-sized to be less than 6mm in diameter and to stop all 6mm projectiles fired at 400fps. Depending on frangibility of ammo relative to the ruggedness of the titanium, spalling of projectiles is possible. There is approximately ~10% reduction in thermal signal. Due to reduced thermal signal, there is a benefit of reduced thermal noise. 

Level 3 - Germanium lens + titanium honeycomb. The ultimate in protection. Both materials are used in tandem for maximum protection and safeguards against spalling. While this combination is multi-impact rated, due to the fragile nature of germanium and spalling, durability of the germanium is not guaranteed.

Kit includes: 

• DRS-TH protector housing
• Thermal lens protector (titanium and/or germanium)
• 2x nuts and bolts to retain use of the factory rubber bikini cover
• 3x longer bolts to secure factory flip-open cover

A Torx-5 and Torx-6 screwdriver, 3-4mm flathead, and #1 phillips are required for the installation of this defender.

INSTALLATION INSTRUCTIONS:

1. With a Torx T6 driver, remove the 3 screws holding the factory flip-down cover, taking care not to lose the 2 door springs (they are side-specific and can only be installed one-way). These bolts are not used again but should be retained if you wish to use the DRS-TH without the protector in the future
2. Install polycarbonate lens into protector housing
3. Remove rubber bikini cover from DRS-TH and keep the two bolts. These will be used again to secure the protector housing against the DRS-TH
4. Using the included two (2) nuts and bolts, re-attach the rubber bikini cover to the protector housing
5. Place the protector housing against the DRS-TH
6. Ensuring that the flip-down cover springs are installed back into the cover, carefully angle the flip-down cover so the "legs" of the springs rest on the internal ledge of the DRS-TH. Test function of the flip-down cover - it should spring into an open position.
7. Using the three (3) longer hex bolts and a T5 driver, secure the flip-down cover and protector into the DRS-TH
8. Install the two bolts from step 3 back into the DRS-TH. This will help the protector be retained against the DRS-TH.
9. Installation is complete

DISCLAIMER: Due to the brittle nature of germanium, neither Cold Harbour Supply nor ISLE MFG are liable for damage to the host device as a result of the failure of the user to replace the sacrificial lens as necessary after impacts when the structural integrity may be compromised.