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Introducing the PERST-4



Product Overview

URSASEC® introduces our advanced “PERST-4”  offering a solution to night time operations. This is a rebuilt clone, with modified circuitry to allow an cost effective, and functioning PERST at half the price. This powerful nighttime aid will make sure you're on target. You cant go wrong with this price and the features offered below.

Product Description:

  • The combined device, referred to as the CD, "Perst-4" (GREEN+), is designed for indicating the target during observation, inspection, and shooting from small arms.
  • CD "Perst-4" features two ranges for night use: green (520 nm) and infrared (IR) (850 nm) along with IR lighting with a wavelength of 850 nm.
  • It is a small-sized optical-mechanical device that generates a luminous flux of laser radiation.
  • The product is equipped with a new connector of their own production for easy installation.
  • It can be mounted on various types of small arms using the Picatinny rail.
  • The KV-D2 tactical switch is included in the kit and can be installed on both Picatinny and Basis rails.


  • Laser Light Source: Combined green semiconductor laser module (520 nm) and IR glow (850 nm).
  • IR Light Source: Laser diode (850 nm).
  • Power Supply: CR123A battery (3V).
  • Effective Range in the Dark:
    • Green+: 300 ± 100 m
    • IR: 400 ± 100 m
  • Product Weight (without batteries): Not more than 210 g
  • Overall Dimensions: (37х60х91) ± 3 mm
  • Operating Temperature: From -20°C to +40°C
  • Continuous Operation Time: At least 12 hours with a stable luminous flux.
  • Warranty Period: 12 months from the moment of commissioning.

Operational Benefits:

  • Can be activated using buttons on the device or the remote tactical button.
  • Brightness adjustment available from both the body and the remote button.
  • Product can be locked.
  • Laser operation indicator on the product body.
  • Pulsating mode with a frequency of 2 Hz.
  • Unified alignment of both beams.
  • Compatible with all tactical switches from the "D" line.

Compatibility and Accessories:

  • Tactical switches from the "D" line (KV-D2 and others) are compatible with "Perst-4" CD from gen.3.0 onwards.
  • If used with the Klesch-2 flashlight (from version 2.0), the KV-D3/2P (double) switch should be used.

In the Kit:

  • "Perst-4" combined device gen.4.1 (GREEN+): 1 pc
  • CR123A Battery: 1 pc
  • KV-D2 Tactical Switch: 1 pc
  • Manual: 1 pc
  • Aluminium Cylinder (Case): 1 pc


  • The product is available in two versions based on the color of the visible laser: red and green+.



This is sold as a single unit.


Legal Terms and Conditions



Legal – Terms and Conditions



All terms apply to URSASEC sales.

 It is important to remember that nothing is “bulletproof”. Our body armor is only bullet resistant, and if a bullet strikes you there is always a risk you will be injured or killed. We will only ship to states where Body Armor is allowed, please know your local and federal laws prior to purchasing. Residents of Connecticut are prohibited from buying Body Armor. By making a purchase on our website ( or in person of our products you agree that you:


Are 18 years or older

Are a Citizen or Lawful Permanent Resident of the United States

Have no felony convictions

Are legally allowed to purchase and use the item in your state. 

Agree to these Terms and Conditions 

Are not involved with criminal organizations and are only purchasing for lawful purposes.

Are not purchasing the item on behalf of someone else in order to avoid complying to these Terms and Conditions.

Assume all risks of use or misuse Spartan Body Armor, and agree not to hold URSASEC ( liable in any way. 

Ensure that your ballistic panels are properly inserted and installed. Though we have 100% confidence in our products, we must always remind the purchaser to NEVER TEST BODY ARMOR ON A PERSON! 


URSASEC assumes no liability for your use or misuse of any item sold or donated, including without limitation any incidental or consequential liability. All warranties, including the warranties of fitness for a particular purpose and merchantability is hereby excluded. No oral agreement or warranty of any kind shall be binding unless in writing and signed by URSASEC. Statements, images, or descriptions are informational only and are not given as a warranty in any way. URSASEC  does not cover any consequential damages, and its liability is limited to preparing or replacing defective items. Every item is sold as is with all faults. The entire risk as to the quality and performance of the product is with the purchaser and operator wearing the product.


Our protective fragmentation coating has been tested time and time again. In fact, we do random field sampling on them several times a month. Though we have complete confidence in our armor systems, we do NOT guarantee the results seen on the testing videos. Different ammunition and climate conditions can all impact the performance of our protective coating.  Again, rest easy knowing we trust our lives with our armor, but make no guarantee of the ballistic performance of the protective coating.


Export Administration Regulations (EAR) and International Traffic in Arms Regulations (ITAR) - US Export Regulations:

Level III and IV rifle rated body armor (Rifle Plates) fall under jurisdiction of the Export Administration Regulations (EAR) and International Traffic in Arms Regulations (ITAR), and are subject to the export control laws of the US Government. Export or re-transfer of Rifle Plates by any means to any foreign end user or for any other end use, whether in the US or abroad without written approval of the US Department of Commerce or Department of State is prohibited.

The sale, transfer, transportation, or shipment outside of the US of any product prohibited or restricted for export without complying with US export control laws and regulations, including proper export licensing, documentation or authorization, is strictly prohibited and may result in civil penalties and/or constitute a federal crime URSASEC will not engage in any transaction that requires the illegal export of any products and will not assist directly or indirectly with the illegal export or re-export of any products.


Copyright: The entire content included in this site, including but not limited to text, graphics or code is copyrighted as a collective work under the United States and other copyright laws, and is the property of URSASEC ( Permission is granted to electronically copy and print hard copy portions of this site for the sole purpose of placing an order with URSASEC products.


If any part of these terms is held to be invalid by a court of competent jurisdiction, such shall not affect the validity of any other part of these Terms. Headings are for convenience only, and do not limit or affect these terms.


These terms may be updated at any time.


This post is approved by Ursa Securities LLC


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